LUXMUX BeST-SLED ISB2 User manual

Document #LUX-BeST-SLED_V2_ISB-UM-2020-07_28 ©2020 Luxmux
User Manual
Multi Channel Superluminescent Diode Light Source (Multi-SLED)
Tradename: BeST-SLED®
Integrated Spectral Bench (ISB2)

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Company Mission
To establish lasting relationships with our clients by providing reliable products,
exceptional customer service, and ongoing support. Everyone at Luxmux is part of our
continuous improvement culture.
Company Vision
To illuminate the solutions that photonics can provide through continuous innovation
of our own products and technology.
Quality Policy
At Luxmux we use only the highest-quality components, manufactured consistently to
our stringent specifications. After assembly, we test each system in-house before it is
carefully packaged and shipped to customers. We ensure our customers receive well-
built and thoroughly inspected products.
The BeST-SLED® product line is tested to comply with the Telcordia reliability standards.
Contact Support
For any issues related to technical support or service, please contact:
[e-mail]

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Table of Contents
1. Description...........................................................................................................................................................4
2. Safety...................................................................................................................................................................5
3. Operation.............................................................................................................................................................6
3.1 Parts List ........................................................................................................................................................6
3.2 Physical Driver Functionality .............................................................................................................................7
3.3 Hardware Requirements .............................................................................................................................12
3.4 Software Operation.....................................................................................................................................12
4. Application Protocol Interface (API)..................................................................................................................24
4.1 Serial MODBUS-RTU (USB interface/RS232) ...............................................................................................24
4.2 MODBUS-TCP/IP (Ethernet interface) .........................................................................................................25
4.3 Best-SLED®ISB2 Register Map .....................................................................................................................25
5. Fiber Coupling....................................................................................................................................................26
6. Technical Data ...................................................................................................................................................27
7. Dimensions ........................................................................................................................................................29
7.1 Dimensions –BeST-SLED®Standard.............................................................................................................29
7.2 Dimensions –BeST-SLED®Low DOP.............................................................................................................30
7.3 Dimensions –BeST-SLED®Standard with Power Meter..............................................................................31
7.4 Dimensions –BeST-SLED®Low DOP with Power Meter ..............................................................................32
8. Troubleshooting ................................................................................................................................................33
9. Limited Product Warranty (“WRTY”).................................................................................................................34
10. Compliance......................................................................................................................................................36
11. Acronyms.........................................................................................................................................................36
12. Ordering Code .................................................................................................................................................37
12.1 Standard BeST-SLED®models ........................................................................................................................37
12.2 Optional: Light Output Connector.................................................................................................................39
12.3 Optional: Power Meter..................................................................................................................................39
13. Contact Information ........................................................................................................................................39

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1. Description
The BeST-SLED® Integrated Spectral Bench (ISB2) product is a compact
Superluminescent Diode (SLED) solution employing Luxmux’s high performance Optical
Spectral Engine (OSE2) module. The ISB2 series consists of various multiple SLED
configurations; refer to “Section 12. Ordering Code.” The ISB2 design is based on
Luxmux’s proprietary driver and electronics platform, and consists of the BeST-SLED®
OSE2, independent SLED control, independent monitor diodes on each SLED, thermal
management, communication, user interface software and optional power meter.
Features
-Between two and six superluminescent diodes available (SLEDs) in a single unit
-Each SLED comes with a built-in independent monitor photodiode and one
common thermoelectric cooler (TEC) for all SLEDs
-Fiber-coupled output power from 12mW to 40mW; Free Space output power from
35mW to 130mW
-Bandwidth FWHM from 100nm to 460nm
-Spectral coverage from 1265nm to 1725nm
-Luxmux’s patented technology for spectral stitching provides optimum power and
bandwidth
-Multiple communication interfaces: USB, RS-232, Ethernet
-Internally optimized for maximum coupling efficiency with PM1550-XP Fiber or
PM1300-XP
-Monolithic integration of a Broadband Dual Stage PMF Isolator (35dB)
-Light output: FC/APC Connector (Optional FC/PC or SMA); Free Space light output:
AR Coated Sapphire Window
-User friendly GUI and custom API available for test automation

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2. Safety
All statements regarding safety of operation and technical data in this user manual will
only apply when the unit is operated correctly.
The driver must not be operated in environments susceptible to explosion
hazards.
Do not obstruct the air ventilation slots.
If any parts of the driver, or electronics are broken or exposed, contact Luxmux
technical support and do not attempt to operate the unit.
The ISB2 is a Class 1M laser product. It is safe for all conditions of use except when
passed through magnifying optics such as microscopes and telescopes. It
produces a beam that is divergent. If light is re-focused use protective eye wear.

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3. Operation
3.1 Parts List
Inspect the shipping container for damage. If the shipping container seems to be
damaged, keep it until you have inspected the contents and the unit mechanically and
electrically.
Verify that you have received the following items within the package:
1 BeST-SLED® Integrated Spectral Bench
1 Power supply. Input: AC 100-240V Output: 12V
1 Power Cord
1 USB 2.0 A to B Cable
1 User Manual
1 BeST-SLED® ISB2 Final Inspection Test Report

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3.2 Physical Driver Functionality
Side Panel - Power:
The power side panel consists of the 12V power jack and a two-position power switch
to turn the unit ON/OFF as shown Figure 1.
Figure 1: Power Side Panel
When the unit is plugged in for power and the power button is in the “I” (ON) position
the power LED of the front panel will light up.
The ISB2 can be powered up with the power supply provided by Luxmux or with User’s
power supply if it fits the following specifications:
1. 12VDC (max. 14VDC) and minimum 3A current supply capability.
2. Power Barrel Connector Jack 2.00mm ID, 5.50mm OD, 9.5 mm Length.
3. Center Positive

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Side Panel –Communications and Control:
The right-side panel consists of a USB Type B connector, Ethernet and RS232 for
communication and a 7-position slide type switch module; see Figure 2.
The left-most switch controls whether the driver will be operated in MANUAL MODE or
PC MODE.
If the driver is controlled through the PC based software or Luxmux’s API, connect either
a USB, a Serial and/or Ethernet cable for communication. In MANUAL MODE, no
connection to USB, RS232 or Ethernet is required and the SLEDs can be turned ON/OFF
with the 6 switches on this side panel.
The switches are labeled from 1-6 corresponding to the SLED number, with SLED 6
having the shortest wavelength and SLED 1 having the longest wavelength. Please refer
to the Final Inspection Test Report included with the BeST-SLED® Integrated Spectral
Bench for SLED numbering as well as corresponding wavelengths and maximum
operating currents.
When turning individual SLEDs “on” or “off” in MANUAL MODE they will be driven at
their default current settings. Default current settings for MANUAL MODE can be
changed through the software and will be explained in the Software Operation section.
When running the Luxmux software, toggle the left switch to PC MODE in order to
control SLEDs from software. The SLED control will be disabled in the software if
operating in MANUAL MODE. Software will still display current levels when running in
MANUAL MODE but users will not be able to adjust the operating currents.
Figure 2: Communications and Control Panel

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Front Panel - Light Output:
The front panel includes three LEDs, vent holes and light output connector, allowing
users to connect their own fiber optic cable to the ISB2; see Figure 3. BeST-SLED® comes
with FC/APC as standard, but FC/PC and SMA connectors are available upon customer
request.
When the unit is plugged in for power and the power button (side panel) is in the “I”
position the red “POWER” LED will light up.
The yellow “READY” LED will start blinking until the unit is ready for operation. When
the yellow “READY” LED stops blinking and stays on, the SLEDs are enabled and users
can turn them on. When SLEDs are turned on and light is being emitted the green “ON”
LED will light up.
If the ISB2 is controlled through the Luxmux software, the SLED controls will be disabled
until the unit is ready, as explained in the Software Operation section.
Otherwise, in MANUAL MODE or Luxmux’s API, if the user turns on the SLEDs before the
unit is ready, the unit will not emit light until the “READY” stops blinking. Once the yellow
“READY” is on the ISB2 will allow for SLEDs to start emitting light.
In the event of a fast and large temperature change in the environment, the unit may
stop emitting light until the BeST-SLED® is ready again, in such case, the yellow “READY”
LED will start blinking.
Figure 3: Front Panel –Light Output

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Back Panel - Thermal Management:
Free air circulation around the rear of the unit should be maintained for good thermal
performance. If the ISB2 is operated in environments over 35 Degrees Celsius the ISB2
should be mounted to an external heatsink. Free air circulation around the ISB2 is
required when it is used without a heatsink. A minimum of 0.5”clearance is
recommended for free air circulation around the top and sides of the ISB2 Unit.
Air circulation is located on the back panel of the ISB2 Light Source, while additional
ventilation holes are located in the front panel. Ensure vents are not obstructed to allow
for maximum air flow.
The back panel includes two fans as shown in Figure 4. Upon powering up the unit, each
fan is regulated automatically to its maximum speed. Users do have the option,
however, to control fan speed manually as explained in the Software Operation section.
If the fan is not working and the heat sink temperature goes over 60˚C, turn the unit off
and contact Luxmux technical support.
Figure 4: Back Panel –Thermal Management

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Power Meter (Only in models ordered with Power Meter)
The power meter adapters can come with FC/APC, FC/PC or SMA connectors. Connector
style must be specified when placing an order. If the ISB2 is controlled through the
Luxmux software, current and power is displayed in the UI as explained in the Software
Operation section. Otherwise, if using Luxmux’s API, use the responsivity curve shown
in Figure 5 to convert photodiode current to optical power.
Figure 5: Power Meter Responsivity Curve

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3.3 Hardware Requirements
CPU: 1 GHz or higher
RAM: 256 MB
Hard disc with at least 100 MB free storage space
USB 2.0 port
USB cable according the USB 2.0 specification
The driver is compatible with the following operating systems.
−Windows ® 7 (32-bit, 64-bit)
−Windows ® 8 (32-bit, 64-bit)
−Windows ® 10 (32-bit, 64-bit)
3.4 Software Operation
When starting up, the software will automatically scan your computer’s ports and find
the BeST-SLED® ISB2. Please wait until a connection is established and the status bar on
the bottom right shows your connection type (USB/RS-232/Ethernet). Figure 6 shows
the main console of the software.
Figure 6: Main Console of Luxmux BeST-SLED® ISB2 Driver

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SLED Controls:
There are 6 individual slider bars to independently adjust the current of each SLED; see
Figure 7.
Based on the ISB2 model, the maximum current of each SLED will be limited and the
sliders’ maximum values will be adjusted accordingly when the BeST-SLED® ISB2 is
connected. The center wavelength will be displayed with each SLED number.
Figure 7: SLED Controls Section
Each SLED’s current can be adjusted using its specific sliding bar. Additionally, all SLEDs
can be set to their Maximum or Minimum by clicking the “Set Max” or “Set Min” buttons
on the left of the sliders. The user can also manually type the desired set current by
double clicking the Set Current box underneath the sliding bar, typing a desired value,
and pressing the “Enter”key on their keyboard.
When the unit is turned on, the SLED Controls will be disabled, inhibiting the user from
moving the sliders or setting the current until the unit is ready and the Yellow LED stops
blinking.

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For each SLED, the Actual Current is sensed and displayed. The boxes below the Actual
Current row show the monitor photodiode current. The monitor photodiodes are
physically placed on the back facet of each SLED, inside the BeST-SLED® 32-pin Package
Optical Spectral Engine, and can be used as a reference for the light each SLED is
emitting. Note that monitor diode values will vary depending on which SLEDs are on.
By default, Modulation will be Off. However, the user can enable Modulation by clicking
the “Modulation”button in the bottom right of the main console to open Modulation
Settings. With the Modulation Settings window open, the user may then enable
modulation by setting “Enable Modulation” to “ON”. Note that the SLED power must
first to be set to “ON” in order to open the Modulation window. Once Modulation is
enabled, the user Can enable modulation for each of the individual SLEDs. Maximum
Modulation Current is displayed for each individual SLED, and is dictated by the SLED’s
current setting in the Main Window. Note that once Modulation is enabled, this current
setting is not variable, and the user must disable modulation in order to change it.
The Modulation Frequency has a default of 1kHz with a 50% Duty Cycle. Modulation
frequency and/or Duty Cycle can be altered by the user by clicking the “Change” button
next to the desired text field, then typing in the desired value and clicking “Save”.
Modulation is specified in Hz while Duty Cycle is specified as a percentage. Additionally,
the user may choose which SLEDs will be modulated by turning them on or off with the
respective “ON/OFF” button(s). Note that if an individual SLED’s modulation setting is in
the “OFF” position, no current will be sent to that SLED.
Figure 8: Modulation Settings Window

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Thermoelectric Cooler (TEC) Controls:
The SLED TEC is used to control the common bench temperature of all SLEDs. The TEC is
turned ON/OFF by toggling the enable button. Note that if a user turns the SLED TEC off,
the driver will automatically turn off all SLEDs to avoid overheating and damage.
Users can set their desired TEC temperature by clicking the “Save”button beside the
“Set Point”box; see Figure 9. Factory default recommended value is 23˚C. The real-time
TEC temperatures are shown in the “Temp Read”box and TEC Current is shown in the
“Current Read”box. TEC Capacity represents how hard the TEC is working to maintain
the temperature of the SLEDs. At 100% capacity, the TEC is working at its maximum
capacity to maintain this temperature.
Note: A negative current reading corresponds to TEC cooling, and a positive current
reading corresponds to TEC Heating.
Figure 9: TEC Controls Section
System Temperatures
SLED 6 Temperature, Heat Sink Temperature, and Fan Speed (CFM) are displayed to
help the user monitor the thermal management, as shown in Figure 10.
Figure 10: System Temperatures Section

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Fan Controls
Factory default settings will automatically control the air flow. When the unit is
powered on, fan speed will default to its maximum value. Realtime fan speed is read
from the unit and displayed in the fan speed “Reading” box.
To change the fan speed, the user may type a desired fan speed value (0.0 to 7.0 CFM)
into the fan speed “Set Point” field, then click the “Set” Button.
Note: The user-defined fan speed Set Point will not be saved when the unit is powered
off. It is recommended to run the unit only at factory default fan speed.
Power Meter (Only in models ordered with a Power Meter)
The Power Meter Section, shown in Figure 11, will only be enabled if the BeST-SLED®
ISB2 has a Power Meter, otherwise “Start”, “Stop” and “Clear” buttons will be disabled.
Figure 11: Power Meter Section

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By clicking “Start” the program will start plotting Current vs. Time. If logging is enabled,
these values will be logged in the logfile. Graph space can be cleared at any time without
losing the data on the logfile by clicking “Clear”. By clicking “Stop,” the power meter will
stop graphing. Clicking start again will resume graphing at the time it is clicked.
Based on the current measured by the Photodiode and the wavelength set by the user,
the software will calculate and plot the optical power or current based on the selected
parameter. To see the responsivity curve used to convert photodiode current to optical
power, click on “Resp. Curve”. Users can set the wavelength by clicking the “Change”
button beside the wavelength value box, then clicking “Save”. To see the current output
(in mA) select “Current” in the dropdown menu. (Current will be shown by default.)
To see the Power output, select “Power” from the dropdown menu. Power may be
viewed in terms of mW or dBm. To view the graph in the desired unit, click the relevant
button in the top right of the Power Meter section to toggle between mW and dBm.
Using the mouse scroller, users can zoom in and out as well as click and drag to select
an area to view. Pressing the right button of the mouse and moving the mouse pointer
will allow the user to move the displayed area in vertical and horizontal axis. Zoom can
be reset by clicking the “Reset Zoom” button.
By clicking the “Chart Options” button, the window as shown in Figure 12 will appear
with further graph settings like axis, titles, legend, etc. as well as an “Export Graph”
option.
Figure 12: Chart Options Window

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Communications:
The screen shown in Figure 13 will appear when clicking on the “Communications”
button from the main console. When software loads up, the Auto-Scan function will run
to find the virtual com port settings for a USB, RS232 and/or Ethernet connection. Users
can manually enter the communication settings by clicking on “Autoscanning…” to stop
the Auto-scan, then clicking “Manual Connect” to connect via their preferred
communications settings. To Disconnect from a Manual Connection, click the
“Disconnect” button.
USB/RS-232 Serial Configuration:
1. COM Port can be found on device manager
2. COM Speed should always be set to a 115200 Baud Rate
3. MODBUS ID is the unique identifier for the ISB2. It will be 1 by factory default.
Multiple ISB2 Modules can be set up and used with different Modbus ID’s. To
change Modbus ID, enter the new ID into the “Modbus ID”field before attempting
to connect.
Figure 13: Communications Window

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Ethernet TCP Configuration:
1. IP Address will be 192.168.0.1 by factory default.
2. Subnet will be 255.255.255.0 by factory default.
3. Port is 502 by factory default.
The data transfer is represented on the right-hand side of the screen as TX (data send)
and RX (data receive) messages, accompanied by their time-stamps. This is the raw data
sent and received from the software to your BeST-SLED® unit, and is used to monitor
communications.
Logging:
The Best-SLED® ISB2 supports continuous logging of data such as the currents,
temperatures, fan flow, etc. by clicking on the “Logging”tab from the main console.
The window shown in Figure 14 will open. Enter the logging file name and directory for
where the data is to be stored by clicking on the “…” button. After the filename and
path have been selected, to start logging, click the check box before “Log to File”to
enable the logging.
Note: Log Files must use the .csv (Comma Separated Value) file extension.
Figure 14: Data Logging Window

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The “Communications Log” tab shows the continuous data transfers from the driver to
the computer; see Figure 15. The Communications log can be paused by clicking “Pause,”
exported to a file by clicking “Save to Clipboard,” or the window can be emptied by
clicking “Clear.”
In an event of a communication error, send the communication log to Luxmux technical
support at [e-mail].
Figure 15: Communications Log Tab