DORIC LEDFRJ Series User manual

LEDs with Fiber-optic Rotary Joint
User Manual
Version 2.1.2

Contents
1 General Overview 3
1.1 LED + Fiber-optic Rotary Joint ............................................ 3
1.2 LED Driver ........................................................ 5
1.3 Fan Power Adapter ................................................... 5
2 Operations Guide 6
2.1 Getting Started ...................................................... 6
2.2 FC Connector Installation ............................................... 7
2.3 Stand-alone mode (without Doric Neuroscience Studio Software) ........................ 8
2.4 Connected to Doric Neuroscience Studio Software ................................ 9
3 Doric Neuroscience Studio 10
3.1 Light Sources ....................................................... 10
4 Specifications 19
5 Support 21
5.1 Maintenance ....................................................... 21
5.2 Warranty ......................................................... 21
5.3 Contact us ........................................................ 21
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1
General Overview
1.1 LED + Fiber-optic Rotary Joint
The Doric LED + Fiber-optic Rotary Joint are rotary joints integrated with one or several LEDs. This allows higher through-
put in comparison with conventional Fiber-optic Rotary Joints combined with a Connectorized LED light source.
1.1.1 Connectorized LED with Fiber-optic Rotary Joint
(a) Standard mount (b) Rotor (Yellow) and stator (black)
Figure 1.1: Connectorized LED with Fiber-optic Rotary Joint
The Connectorized LED with Fiber-optic Rotary Joint is a rotary joint with a single integrated LED. The light source is inte-
grated into the Stator (Black), with the light leaving through the Rotor (Yellow) (Fig. 1.1b). It has the following elements.
• The M8 connector port is used to provide power to the LED. The pinout can be found in Figure 4.1.
• The Beam aperture outputs light. The standard model uses an FC-type connector.
3

1.1.2 Combined LEDs with fiber-optic rotary joint
(a) 2-LED model
(b) 3-LED model (c) 4-LED model
Figure 1.2: Combined LEDs with fiber-optic rotary joint
The Combined LEDs with fiber-optic rotary joint are composed of a standard Combined LED body where the Beam
aperture has been replaced with a Fiber-optic rotary joint. The light sources are integrated into a Stator (Black), with
the light leaving through a Rotor (Yellow) (Fig. 1.3). They contain the following elements.
• The M8 connector ports are used to provide power to the LEDs. There is a single port per LED. The pinout can be
found in Figure 4.1.
• The Beam aperture outputs light. The standard model uses an FC-type connector.
• The Fan grids are found on the sides. They must be kept clear at all times to prevent overheating.
• The Stand is used to hold the LED vertically for easy use of the rotary joint.
Figure 1.3: Rotor (Yellow) and Stator on the LEDFRJ-2
Chapter 1. General Overview 4

1.2 LED Driver
The LED driver is used to provide power and control of various LED modules. The Connectorized LED with Fiber-optic
Rotary Joint can be used with the 1, 2 or 4-channel LED driver. The Combined LEDs with fiber-optic rotary joints can be
used with any driver having at least as many channels as the number of combined LEDs. For more details on driver
specifications and operation, see the LED Driver Manual.
Figure 1.4: 1,2 and 4-channel LED Driver
1.3 Fan Power Adapter
The Doric Fan Power Adapter allows the usage of LEDFRJ with the next-generation LED Driver. For more details specifi-
cations and operation, see the Fan power adapter manual.
Figure 1.5: Fan Power Adapter
Chapter 1. General Overview 5

2
Operations Guide
2.1 Getting Started
1. Installation depends on the specific source chosen.
• If using the Single-LED model, the rotary joint must first be installed in its holder (Holder FRJ large,GH FRJ).
It can then be mounted into the setup using 1/4 or M6 nuts and screws.
• If using a Combined LED model, the holder is already integrated. It can then be mounted into the setup using
1/4 or M6 nuts and screws.
Figure 2.1: Fan Power Adapter Installation Schematic
2. Connect the Power Splitter to the 12 V Power Supply.
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3. Connect one output of the Power Splitter to the Doric LED Driver 12 V input, the other to the Power Extension Cable.
4. Connect the Power Extension Cable to the Fan Power Adapter 12 V input.
5. Connect each channel of the LED driver to the input connectors of the Fan Power Adapter using M8 cables.
6. Connect LEDFRJ to the Fan Power Adapter using M8 cables.
7. Connect the 12 V power supply to the wall plug.
8. Ensure the power key and the interlock plug are properly set in place.
9. Apply current and voltage within the limits indicated in table 4.2. On the Combined LED models, it is critical not to
block or insert objects into the grids as this could block airflow and reduce cooling efficiency.
10. When not in use, place plastic caps on the connectors for protection and cleanness.
2.2 FC Connector Installation
1. Clean the optical fiber connector before insertion. Use isopropanol and a lint-free wipe.
2. With an FC connector, the connector key must be oriented to enter within the receptacle slot to ensure proper
connection (Fig. 2.2).
Figure 2.2: FC connector, Fiber Installation
To reduce the risk of eye injury, it is sound practice to NOT CONNECT/DISCONNECT OPTICAL
FIBERS when the light source is turned on.
Chapter 2. Operations Guide 7

2.3 Stand-alone mode (without Doric Neuroscience Studio Software)
The following sections details stand-alone operation of the LED driver. For installation of the LEDFRJ in stand-alone
mode, see section 2.1.
2.3.1 Driver operation modes with the stand-alone device
If the light source driver is used as a stand-alone device, 3 modes are available: constant current (CW), external TTL (Ext.
TTL), and external Analog (Ext. Ana). The operating mode is changed by pressing the Control knob. The maximal driving
current is set by turning Control knob. Use a fast/slow rotation for coarse/fine adjustment. The operating mode and the
maximum driving current setting are independently adjusted for each channel.
Constant current (CW)
Figure 2.3: Constant Current Mode Driver Signal
When using the CW mode, the user simply sets the driving current applied to the light source. The light source is acti-
vated and an output beam will be visible as long as the driving current is above the minimum driving current (Fig. 2.3).
External TTL (TTL)
Figure 2.4: Driver Signal Response to External Source in External TTL Mode
In the External TTL mode, the driver is activated by an input TTL signal coming from an external device. This activation
will follow the TTL pulse waveform. The driving current is set with the control knob, and is constant during each TTL
activation pulse.
Chapter 2. Operations Guide 8

External Analog (Ext. Ana.)
Figure 2.5: External analog pulse sequence behavior
The External Analog mode is similar to the External TTL, except that the driving current is proportional to the voltage ap-
plied on the BNC input connector (Fig. 2.5, top). On the input BNC, a maximum voltage signal corresponds to a maximum
driver current. Should the current set on the light source be less than the maximum current, any voltage corresponding
to a higher current will clip the output waveform (Fig. 2.5, bottom). To avoid any clipping of the output waveform, the
maximum current setting must be equal to or greater than the corresponding maximum analog input voltage.
2.4 Connected to Doric Neuroscience Studio Software
1. Connect the LED Driver to the power outlet with the included 12 V power adapter and turn the LED Driver switch
ON. Always power the LED Driver before connecting the USB cable to the computer for a proper driver in-
stallation.
2. Install the Doric Neuroscience Studio Software on the computer. Double-click on the setup DoricStudioX.X.exe
file located on Doric USB memory stick supplied with the LED driver and follow the on-screen instructions.
3. Connect the USB-A/USB-B cable to the driver and the computer.
4. Connect each M8 connector of the Combined LED to the LED driver using an M8 electric cable.
5. With the system connected, the software can be used to control the device in External TTL, External Analog,
Internal TTL and Internal Complex modes. See section 3.1 for more details on using the software.
Chapter 2. Operations Guide 9

3
Doric Neuroscience Studio
3.1 Light Sources
Doric Light Sources can be controlled by the Doric Neuroscience Studio. These include LED Modules, Laser Diode Modules
and Ce:YAG Fiber Light Source. The interface is separated into two main sections, Control & settings and the Acquisition
View. Each light source driver has a number of Channels, each one controlling a light source of its given type. These
channels, accessible using the Add Channel will be the first detailed.
Figure 3.1: Light Source Driver Tab
3.1.1 Channels
Each light source driver is separated into a number of Channels. Each channel controls a single light source. While each
channel can be controlled in Stand-alone mode by the driver, additional functions can be accessed for these channels
when the driver is connected to the Doric Neuroscience Studio. These function are used through the Channel Config-
uration window (Fig. 3.2).
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Figure 3.2: Light Source Channel Configuration Window
1. The Channel Types (Fig. 3.2) are displayed on the left side of the window. These include Laser light sources,
Ce:YAG light sources and LED light sources, as well as the Scope to measure signal using the driver.
2. The Channel Options box (Fig. 3.2) includes Light Source Options and Trigger Options for the given channel.
a) The Channel (Fig. 3.2) drop-down list identifies which driver channel is currently being edited, assuming a
driver with multiple channels.
b) The Mode (Fig. 3.2) drop-down list includes each possible driver mode. These are used to control the pulse
sequences emitted by the light source. The options related to this mode are detailed with the Sequence
Options.
c) The Current Options (Fig. 3.2) includes the slider used to control the current sent to the light source.
• When using a LED Driver module, the Overdrive checkbox will appear. When selected, this allows the
system to exceed the normal safe current limit of the light source. THIS SHOULD ONLY BE USED WITH
PULSED SIGNALS, AS IT CAN OTHERWISE DAMAGE THE LIGHT SOURCE.
• When using a LEDD, the Low-Power checkbox will appear. When selected, this allows reduced-power
signaling for the same voltage. This mode is only available for CLED modules. This allows low-power
signals to be more stable in time. The maximal current is reduced to one tenth of light source’s normal
maximal current. If the BNC Output is used, the voltage of the signal is proportional to the current pass-
ing through the light source, and not the voltage sent to it. For example, a driver with a normal maximum
current of 2000 mA for a 5 V signal (400 mA/V) will have a maximum current of 200 mA for a 5 V signal
(40 mA/V). The BNC output of the driver will still relate LED current with a 400 mA/V conversion factor.
d) The Trigger Options (Fig. 3.2) allow the selection of a number of trigger modes to activate a pulse sequence.
• The Manual trigger mode is standard, and allows direction activation by the user.
• The Triggered trigger mode is active when an input greater than 4 V is detected on the BNC input. Fol-
lowing input pulses will be ignored while the sequence is running. The sequence will restart with the
arrival of the first input pulse after the sequence has finished.
Chapter 3. Doric Neuroscience Studio 11

• The Gated trigger mode is active as long as there is a high TTL signal (4 V or more) on the input modu-
lation BNC. This signal comes from a different light source or device driver. When the TTL signal is low
(0.4 V or less), the sequence stops and waits for another high TTL signal to continue.
• If the TTL Output option is checked, the output BNC channel can be used as a TTL generator. The mon-
itoring signal will provide a TTL signal instead of an analog voltage output proportional to the LED cur-
rent. The output will send out a 5 V signal whenever the input current is >0 mA. This can be used even if
a light source is not connected.
3. The Sequence options box (Fig. 3.2) is where sequence options are defined depending on the mode. The Contin-
uous wave, External TTL and External Analog modes have no additional sequence options.
Figure 3.3: Constant Current Mode Driver Signal
a) The Continuous Wave mode (Fig. 3.3) produces a continuous signal at the chosen current. This mode can
only be triggered manually. When this mode is active, the driver channel will show CW under MODE. This
mode has no additional sequence options.
Figure 3.4: Driver Signal Response to External Source in External TTL Mode
b) The External TTL mode (Fig. 3.4) has the light source follow a TTL signal provided by an external source
connected to the BNC Input. When this mode is active, the driver channel will show TTL under MODE. This
mode has no additional sequence options.
c) The External Analog mode (Fig. 3.5) is similar to the External TTL, except that the current will be set by the
voltage on the BNC input (Fig. 3.5, top). On the input BNC, a maximum voltage signal corresponds to a max-
imum driver current. Should the current set on the light source be less than the maximum current, any volt-
age corresponding to a higher current will clip the output waveform (Fig. 3.5, bottom). To avoid any clipping
of the output waveform, the maximum current setting must be equal to or greater than the corresponding
maximum analog input voltage. See the corresponding light source manual to find the voltage/current rela-
tionship. This mode has no additional sequence options.
Chapter 3. Doric Neuroscience Studio 12

Figure 3.5: Driver and Light Source in External Analog Mode
Figure 3.6: Light Source Channel Configuration Window, square sequence options
d) The Square sequences mode has the light source follow a square pulse sequence.
i. The Starting Delay (Fig. 3.6) sets the delay (in hh:mm:ss:zzz format) before the first pulse.
ii. The Frequency/Period (Fig. 3.6) sets the frequency (in Hz) or period (in ms) for the pulse sequence.
For example, a signal at 10 Hz (frequency) will output one pulse every 100 ms (period), whereas a pulse
sequence at 0.5 Hz (frequency) will output one pulse every 2000 ms (period).
iii. The Time ON/Duty Cycle (Fig. 3.6) sets the time (in ms) or the duty cycle (in %) for each pulse. The Time
ON must be lower than (1/frequency)+0.005 ms, while the Duty cycle must be below 100 %. These
squares will appear red should an impossible Frequency/time ON be selected. Should the Smoothing
option be selected, this feature becomes inaccessible.
Chapter 3. Doric Neuroscience Studio 13

iv. The Smoothing option is used to change the pulse slope in square pulse sequences. The Edit Edges
button opens the Smoothing Edge(s) window (Fig. 3.7).
Figure 3.7: Light Source Smoothing Edge(s) Window
A. The Rise Time box is used to define the duration to rise from 0 to the pulse maximum.
B. The Plateau Time box is used to defined the duration the pulse is at its maximum value.
C. The Fall Time box is used to define the duration to descend from the pulse maximum to 0.
D. The Pulse Graph displays the pulse shape.
E. The Active Time box displays the total duration of the pulse. While the Smoothing option is active,
the Time ON is fixed at this value.
v. The Pulses per sequence (Fig. 3.6) sets the number of pulses per sequence. If it is set to 0, the pulse will
be repeated indefinitely.
vi. The Number of sequences (Fig. 3.6) sets the number of times that the sequence will be repeated. If it is
set to 0, the sequence will be repeated indefinitely.
vii. The Delay between sequences (Fig. 3.6) sets the delay (in hh:mm:ss:zzz format) between each sequence
if the Number of Sequences is greater than 1.
viii. The Total Duration (Fig. 3.6) displays the total time of the experiment. The different values can be Inf
for infinite, a valid time value or Err if the Time ON value is greater than 1/frequency.
Figure 3.8: Complex Sequences Window
Chapter 3. Doric Neuroscience Studio 14

e) The Complex Sequences mode mode allows the design of complex pulse sequences. Multiple sequences can
be combined to create a more elaborate pulse sequence. These are displayed in a spreadsheet format.
i. The Starting Delay (Fig. 3.8) sets the delay (in hh:mm:ss:zzz format) before the first pulse sequence.
ii. The Max Current (Fig. 3.8) sets the maximum current (in mA) for the given sequence.
iii. The Number of sequences (Fig. 3.8) sets the number of times that the sequence will be repeated, with a
minimum of 1.
iv. The Pulses per sequence (Fig. 3.8) sets the number of pulses per sequence, with a minimum of 1.
v. The Delay between sequences (Fig. 3.8) sets the delay (in hh:mm:ss:zzz format) between each sequence
if the Number of Sequences is greater than 1.
vi. The Frequency/Period (Fig. 3.8) sets the frequency (in Hz) or period (in ms) for the pulse sequence.
These two values are linked, and when one is changed the other will adjust automatically. For example,
a signal at 10 Hz (frequency) will output one pulse every 100 ms (period), whereas a pulse sequence at
0.5 Hz (frequency) will output one pulse every 2000 ms (period).
vii. The Time ON/Duty Cycle (Fig. 3.8) sets the time (in ms) or the duty cycle (in %) for each pulse. These
two values are linked, and when one is changed the other will adjust automatically. The Time ON must
be lower than (1/frequency)+0.005 ms, while the Duty cycle must be below 100 %.
Figure 3.9: Internal Complex Mode Pulse Sequences
viii. The Types of pulses (Fig. 3.8) sets the pulse type. Pulses can be Square, triangular (Triangle), Ramp
up Ramp down or Delay (Fig. 3.9). The Delay pulse type is used to create a delay between different
sequence
ix. The Sequence controls (Fig. 3.8) allow the addition (+) or removal (-) of sequences to the spreadsheet.
x. The Total Duration (Fig. 3.8) displays the total time of the experiment. The different values can be Inf
for infinite, a valid time value or Err if the Time ON value is greater than 1/frequency.
f) The Scope mode allows the measurement of electrical signal using the driver (Fig. 3.10). The signal is received
by the Input BNC of the chosen channel on the light source driver.
Figure 3.10: Scope
i. The Channel drop-down list indicated which driver channel will be used to receive signal. The chosen
can be used to drive a light source while serving as a scope.
ii. The Sampling Rate drop-down list allows the selection of the rate (in kilosamples per second) at which
measurements are taken.
4. The Preview box (Fig. 3.2) displays a preview of the chosen sequence while in the Continuous Wave,Square
Sequences and Complex Sequences mode.
5. The Apply button (Fig. 3.2) will generate the defined channel OR update an already configured channel with any
changes.
Chapter 3. Doric Neuroscience Studio 15

3.1.2 Control & Settings
The Control & settings sections is used to control the light source. It includes the following elements.
Figure 3.11: Control & Settings
1. The Add channel button (Fig. 3.11) opens the Channel Configuration window 3.2. See section 3.1.1 for more
details.
2. The Clear Configuration button (Fig. 3.11) clears all configuration channels. Cleared channels cannot be recov-
ered unless previously saved.
3. The Save configuration button saves all currently configured channels in .doric format.
4. The Load configuration button loads a file in .doric format that contains a previously saved set of configured
channels.
5. The Start All button (Fig. 3.11) starts all currently configured channels.
6. The Time Series button opens the Time Series window. This tool allows all channels to share the same timing.
Figure 3.12: Control & Settings, Time Series Window
• The Number of series (Fig 3.12) sets the number of times that the sequence will be repeated, with a minimum
of 1.
• The Time Active sets the duration of each series in hh:mm:ss:zzz format. If the Time series is used in combi-
nation with a sequence, the Time Active should be greater than the sequence Total Time If the Time Active
is shorter, the sequence will be stopped after the Time Active.
• The Interval between series sets the duration between each series in hh:mm:ss:zzz format.
• The Total Duration displays the total duration of the sequence in hh:mm:ss:zzz format.
• The Progression bar displays the progression of the sequence in %, while the Time Elapsed counter displays
the progression in hh:mm:ss:zzz format.
• The Launch button starts the sequence.
7. The Autoscrolling button activates the autoscroll function. When active, the Graph in the Acquisition View will
follow a section as wide as the time defined beside the button.
Chapter 3. Doric Neuroscience Studio 16

8. The Reset Zoom button resets the axes in the Graph to their standard values.
9. The Interlock indicator displays when the interlock is correctly connected, and when discon-
nected.
10. The Ce:YAG Temp indicator displays the temperature of the Ce:YAG source in real time. This indicator will only
appear when a Ce:YAG driver is connected to the computer. Should the temperature be too high the temperature
will appear in red. Should the temperature be too low, the temperature will appear in blue.
3.1.3 Experiment View
The Experiment View box is used to display information related to the usage of each channel. This section allows limited
control of the light source while it is active.
Figure 3.13: Experiment View, Light Source Channel
1. The Light Source Channel box (Fig. 3.13) contains all elements related to a single light source channel.
2. The Scope Channel box (Fig. 3.14) is used to control and configure an active Scope.
Figure 3.14: Experiment View, Scope Channel
3. The Controls View displays all elements to control/configure the channel.
a) The Start/Stop button activates/deactivates the light source connected to the Light Source Channel.
b) The Edit button opens the Channel configuration window to edit the pulse sequence. This button is only
accessible when the channel is deactivated.
c) The Current Box box allows the current to be changed exactly (in mA).
d) The Current Slider allows the light source current to be adjusted.
e) The Status box displays the status of the channel (Light source or Scope). The Status will display RUN-
NING... when active and STOPPED when deactivated.
Chapter 3. Doric Neuroscience Studio 17

f) The Trigger Mode of the light source is displayed in this box.
g) The Progression box displays the progression of the pulse sequence.The advancement of the sequence is
displayed % on the Progression bar, and in hh:mm:ss:zzz format on the Time Elapsed box.
h) The Channel drop-down list is used to chose the channel used as a scope.
i) The Sampling Rate drop-down list allows the selection of the rate (in kilosamples per second) at which mea-
surements are taken.
j) The Start scope channel button activates a live measurement sequence. Important measurements should
not be made as a live measurement, as these only conserve a small amount (60 s) of data.
k) The Record scope channel button starts a recorded measurement sequence.
l) The Export scope channel button allows the recording of a live measurement sequence on the scope.
4. The Graph View displays either a preview of the pulse sequence for Light Source Channels or the received signal
for the Scope Channel.
Chapter 3. Doric Neuroscience Studio 18

4
Specifications
Table 4.1: Typical Connectorized LEDFRJ1 Output Power vs Optical Fiber Core Diameter
LED TYPICAL OUTPUT POWER
1000 mA (mW)1
Overdrive
2000 mA
(pulsed)
Central
Wavelength (nm)
Bandwidth
FWHM (nm)
Core 200 µm
0.53 NA
Core 400 µm
0.53 NA
Core 960 µm
0.63 NA
365 ∼12 6.0 23 100 1
385 ∼12 6.0 23 100 1
405 ∼15 5.0 23 100 1
420 ∼15 5.5 23 100 1
450 ∼25 8.0 23 100 x1.7
465 ∼25 7.5 23 100 x1.7
505 ∼30 3.0 12 50 x1.6
515 ∼40 3.0 9.5 40 x1.5
560 ∼100 2.0 8.5 40 -
595 ∼20 2.0 8.5 40 x1.2
625 ∼20 3.5 14 70 x1.6
635 ∼20 6.5 25 100 x1.6
850 ∼35 6.0 22 40 -
940 ∼35 2.0 10 40 -
5500K - 4.5 17 80 -
Figure 4.1: M8 Connector Pinout
1All power values taken at a maximum current of 1000 mA, except for 365, 385, 405 and 420 nm LEDs (500 mA).
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Table 4.2: General Specifications
SPECIFICATIONS VALUE NOTES
Input Current 0-1000 mA 700 mA recommended
Forward Voltage 3.0-4.0 V typical -
Emission Power See test sheet -
Emission wavelength See test sheet -
NA 0.5 -
Start-Up Torque (Single LED)<10 µN·m -
Start-Up Torque (Multiple LED)<30 µN·m -
Electrical connector M8-4 pins-male -
Dimensions
Single LED model 70 x 39 x 39 mm3without holder
2-LED model 62 x 84 x 119 mm3including holder
3- and 4-LED model 62 x 93 x 144 mm3including holder
Mass
Single LED model 90 g without holder
2-LED model 287 g including holder
3-LED model 403 g including holder
4-LED model 418 g including holder
Output NA 0.5 -
Output optical fibre core diameter <960 µm
Chapter 4. Specifications 20