THORLABS SLS204 User manual

SLS204
Stabilized Deuterium
UV Light Source
User Guide

Stabilized Deuterium UV Light Source
Table of Contents
Chapter 1Warning Symbol Definitions..............................................................................................1
Chapter 2Safety....................................................................................................................................2
Chapter 3Product Overview................................................................................................................3
3.1.Deuterium Light Source..................................................................................................3
3.2.Spectrum..........................................................................................................................3
3.3.Optical Configuration......................................................................................................4
3.4.Output Stabilization ........................................................................................................4
Chapter 4Operation..............................................................................................................................5
4.1.Parts List ..........................................................................................................................5
4.2.Operation Elements ........................................................................................................5
4.3.Switching on the Light Source.......................................................................................6
4.4.Status Indicator ...............................................................................................................7
4.5.Application Ideas.............................................................................................................7
Chapter 5Maintenance.........................................................................................................................9
5.1.Fuse Replacement...........................................................................................................9
5.2.Bulb Module Replacement ...........................................................................................10
Chapter 6Specifications.....................................................................................................................14
Chapter 7Mechanical Drawing...........................................................................................................15
Chapter 8Certifications and Compliances.......................................................................................16
Chapter 9Regulatory...........................................................................................................................18
Chapter 10Thorlabs Worldwide Contacts..........................................................................................19

Stabilized Deuterium UV Light Source Chapter 1: Warning Symbol Definitions
Rev A, January 22, 2018 Page 1
Chapter 1 Warning Symbol Definitions
Below is a list of warning symbols you may encounter in this manual or on your device.
Symbol Description
Direct Current
Alternating Current
Both Direct and Alternating Current
Earth Ground Terminal
Protective Conductor Terminal
Frame or Chassis Terminal
Equipotentiality
On (Supply)
Off (Supply)
In Position of a Bi-Stable Push Control
Out Position of a Bi-Stable Push Control
Caution: Risk of Electric Shock
Caution: Hot Surface
Caution: Risk of Danger
Warning: Laser Radiation
Caution: Spinning Blades May Cause Harm

Stabilized Deuterium UV Light Source Chapter 2: Safety
Page 2 CTN011088-D02
Chapter 2 Safety
The lamp comes with a switching power supply compatible with voltages from 100 to 240 VAC. There is no need
to change the fuse.
WARNING
Do not operate this device in explosive environments.
WARNING
Do not operate this device in wet or damp conditions.
WARNING
Do NOT look directly at the light source beam during operation. Do NOT place hand or body part in
the light beam as this may cause burning.
CAUTION: HOT SURFACE
The housing of the lamp can get very hot during operation.
Extensive contact may cause burning.
WARNING: HOT SURFACE
The temperature of the bulb may reach a few hundred ˚C during operation. Always wait for at least
10 minutes for the bulb module to cool down before performing a bulb module replacement. Always
wear gloves when handling bulb modules.

Stabilized Deuterium UV Light Source Chapter 3: Product Overview
Rev A, January 22, 2018 Page 3
Chapter 3 Product Overview
3.1. Deuterium Light Source
A deuterium lamp is a light source that generates light from gas discharge in excited D2gas. The construction of a
deuterium lamp bulb is shown in Figure 1. The bulb consists of shield metal electrodes sealed in a quartz envelope
that is filled with D2gas.
Figure 1 Structure of a Deuterium Lamp Bulb
During ignition, high-voltage pulses are sent through the electrodes to ionize the gas, causing discharge to occur.
After the discharge has been initiated, only a low voltage is required to maintain it. During the discharge, the
pinpoint-sized cloud of plasma in the arc will generate light with very high brightness.
3.2. Spectrum
Thorlabs’ SLS204 Deuterium UV Light Source provides a continuous emission over the 200 nm to 700 nm spectral
region with high intensity and the spectral lines and over the molecular emission range.
Figure 2 shows the typical output spectra of SLS204.
Figure 2 Typical Spectrum
200 300 400 500 600 700 800
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
D  Line
SLS204 Sample Spectrum
Normalized Intensity
Wavelength (nm)
Molecular Continuum
Emission
D  Line
UV Fused Silica
Envelo
p
e
Electrode
Shieldin
g
Base

Stabilized Deuterium UV Light Source Chapter 3: Product Overview
Page 4 CTN011088-D02
3.3. Optical Configuration
The bulb is placed inside the housing, at the back focus of the 1st lens. This lens roughly collimates the output from
the bulb. Then, a 2nd lens focuses the collimated beam into a multimode fiber patch cable, providing a fiber coupled
broadband light source.
The SLS204 light source includes a M114L01 fiber patch cable.
3.4. Output Stabilization
Unlike traditional deuterium light sources, the SLS204 will not suffer either from a gradual decrease or short term
fluctuation in brightness during its lifetime.
SLS204 light source is equipped with an internal feedback loop and therefore can ensure a constant output intensity,
low-noise operation, and a long life span. The principle of operation is depicted in the block diagram below. The
optical intensity is measured by an internal photodiode, which feeds its monitor signal to the controller unit. The
controller unit then adjusts the driving current of the power supply to compensate any drift or fluctuation in the optical
output.
Figure 3 Closed Feedback Loop in SLS204

Stabilized Deuterium UV Light Source Chapter 4: Operation
Rev A, January 22, 2018 Page 5
Chapter 4 Operation
4.1. Parts List
The package contains the following items:
SLS204 Light Source x1
Power Cord x1
2 mm (5/64") Hex Key x1
M114L01 Fiber Patch Cable x1
Location-Specific Power Cord x1
4.2. Operation Elements
Figure 4 Front and Back Panel
SMA905 Fiber
Adapter and Dust
Cap
Lamp On Switch
with LED
Power Switch
LED Status
Indicato
r
AC Power Inlet
Fuse
Label
Cooling Fan
4-40 Tapped Holes
for 30 mm Cage
System (4 Places)

Stabilized Deuterium UV Light Source Chapter 4: Operation
Page 6 CTN011088-D02
4.3. Switching on the Light Source
After setting up the light source on a working surface, follow the steps below to switch it on.
1. Connect the power cord.
2. Connect one SMA connector of the included fiber patch cable to the fiber adapter on the front panel, and
lock the SMA connector.
3. Toggle the rocker switch to the “-” position to power on the device. After it is switched on, the status LED
indicator will be on and show GREEN color if there is no error. For other status indicators, see section 4.4.
4. Press the LAMP ON button to ignite the deuterium bulb. The LED on the button will be ON and show green
color after the button is pressed. Please wait 10 - 40 seconds for the light source to begin output.
The deuterium bulb takes about 10 to 40 seconds to ignite, but please allow 45 minutes to 1 hour for the light source
to stabilize and reach a state of equilibrium.
5. To disable the bulb, press the LAMP ON button again; the LED on the button will go OFF as well.
6. To power off the unit, toggle the rocker switch to “O” position.
Figure 5 Switching on SLS204
CAUTION: HOT SURFACE
The housing of the light source can get very hot during operation. The temperature may reach
~60 °C. Avoid extensive contact with skin.
WARNING
The light source generates UV output. Do NOT look directly at the light source beam during
operation. Do NOT place hand or body part in the light beam as this may cause burning.

Stabilized Deuterium UV Light Source Chapter 4: Operation
Rev A, January 22, 2018 Page 7
4.4. Status Indicator
The LED next to the power switch indicates the status of the light source.
If the indicator is GREEN, the device is operating under regular conditions without any error.
If the indicator is YELLOW, the device is still operational but the bulb is close to end of life.
If the indicator is RED, either the device has overheated, the bulb has failed to ignite, or the bulb has
reached the end of life. Please power off the light source and wait for it to reach room temperature before
powering on again. If the error remains, contact Thorlabs Tech Support.
4.5. Application Ideas
The SLS204 Deuterium Light Source provides compatibility with Thorlabs’ cage system and standard SM1
(1.035"-40) optomechanics. Use the included 5/64" (2 mm) hex key or balldriver to remove the two cap screws and
then remove the dust cage as shown in Figure 6. This will expose the two additional 4-40 threaded holes for
compatibility with Thorlabs’ 30 mm cage system.
Figure 6 Remove the Dust Cap
The fiber adapter on the front panel is an SMA-SM1 fiber adapter and can be removed with a Thorlabs SPW909
Spanner Wrench to expose the internal SM1 thread.

Stabilized Deuterium UV Light Source Chapter 4: Operation
Page 8 CTN011088-D02
With the fiber adapter removed, the light source can operate as a free-space light source. A complex optical system
can be built on to the light source utilizing the 30mm cage system and SM1 optomechanics, as shown in Figure 7.
Figure 7 SLS204 with 30 mm Cage System and SM1 Lens Tube
It is also possible to replace the SMA-SM1 fiber adapter with other types of SM1 fiber adapter for compatibility with
various types of fiber patch cables.

Stabilized Deuterium UV Light Source Chapter 5: Maintenance
Rev A, January 22, 2018 Page 9
Chapter 5 Maintenance
5.1. Fuse Replacement
WARNING
Always power off the unit and disconnect power cord before operating a fuse replacement.
The fuse is located in the fuse drawer below the power inlet. To replace the fuse, press the two clips on the drawer
and pull it out, as shown in Figure 8.
Figure 8 Fuse Location
Take out the used fuses and put in new ones. Please use 3.15 A, 250 VAC, Type "T”, slow blow fuse only.

Stabilized Deuterium UV Light Source Chapter 5: Maintenance
Page 10 CTN011088-D02
5.2. Bulb Module Replacement
WARNING
Always power off the unit and disconnect power cord before opening the housing.
WARNING
The bulb surface temperature may reach a few hundred °C during operation. Always wait at least 10
minutes after turning off the lamp for cool down before performing a bulb module replacement.
CAUTION
Wear protective gloves when handling the bulb module. Moisture and grease from hands left on the
bulb may shorten the bulb life time.
WARNING
The electronics inside a light source are ESD sensitive. When performing a bulb module
replacement, always wear ESD protection to avoid damaging the light source.
Thorlabs offers replacement bulbs for the SLS204 light source.
To replace the bulb module, power off the unit and disconnect the power cord. Wait at least 10 minutes for the unit
to cool down.
Use the included 5/64" (2 mm) hex key to loosen the panel screw on the side of the light source.
Figure 9 Remove the Panel Screws on the Side of the Light Source

Stabilized Deuterium UV Light Source Chapter 5: Maintenance
Rev A, January 22, 2018 Page 11
Hold the bulb cover and slide it sideways to remove it.
Figure 10 Remove the Bulb Cover
The black connector connects the bulb wire to the rest of the electronics. Press the two clamps on the sides of the
connector at the same time and pull it out from the socket. Then, the bulb is electrically disconnected.
Figure 11 Disconnect the Bulb

Stabilized Deuterium UV Light Source Chapter 5: Maintenance
Page 12 CTN011088-D02
Use the 2 mm (5/64") hex key to remove the two cap screws that hold the bulb.
Figure 12 Remove Cap Screws on the Bulb Holder
Carefully pull out the old bulb.
Figure 13 Pull out the Bulb

Stabilized Deuterium UV Light Source Chapter 5: Maintenance
Rev A, January 22, 2018 Page 13
Place the replacement bulb within the bulb receptacle. Please notice that there is a slot on the bulb base which
should fit right on the pin on the front side of the bulb holder, as shown in Figure 14.
Tighten the two caps screws so the bulb is secured in the bulb holder.
Plug-in the black connector to electrically connect the bulb to the light source.
Slide in the bulb cover and tighten the panel screw located on the side of the light source.
Figure 14 Install the New Bulb
Key Slot fo
r
Bulb
Alignment

Stabilized Deuterium UV Light Source Chapter 6: Specifications
Page 14 CTN011088-D02
Chapter 6 Specifications
Specification SLS204
Wavelength Range 200 - 700 nm
Bulb Electrical Power 30 W
Output Fiber M114L01 Patch Cable (Included)
Ø600 µm, 0.22 NA, SMA905 Connectors
Fiber Coupled Output Power10.1 mW (Typical)
Free-Space Output Power2 2 mW (Typical)
Output Power Drift 0.02% Per Hour (Typical)
0.1% Per °C (Typical)
Output Power Stability3<0.06%
Bulb Life Time42000 h
Power Supply 100 – 240 VAC, 50 – 60 Hz
Operating Temperature 0 - 40 °C
Storage Temperature -15 - 70 °C
Dimension (L x W x H) 246.3 mm x 170.0 mm x 129.8 mm
(9.70" x 6.69" x 5.11")
1Measured with Included Fiber Patch Cable at Beginning of Bulb Lifetime
2Measured at the Output Port with the Fiber Port Adapter Removed at Beginning of Bulb Lifetime
3Standard deviation of optical power measured at room temperature over a 1 hour period (after 45 minutes of warm-up) with a 1 Hz sampling
rate.
4Thorlabs defines the end of life condition of this light source as a drop in intensity to
≤ 50% of the initial output at 230 nm.

Stabilized Deuterium UV Light Source Chapter 7: Mechanical Drawing
Rev A, January 22, 2018 Page 15
Chapter 7 Mechanical Drawing

Stabilized Deuterium UV Light Source Chapter 8: Certifications and Compliances
Page 16 CTN011088-D02
Chapter 8 Certifications and Compliances
This product fulfills the requirements of the following Applicable Standards:
2006/95 EC Low Voltage Directive 12.Dec. 2006
EMC 2004/108/EC Electromagnetic Compatibility Directive
EN 61010-1: 2001 Safety of Test and Measurement Equipment
EN 61326-1: 2006 EMC of Test and Measurement Equipment
CISPR 11 Edition 4:2003 Conducted Emissions
CISPR 11 Edition 4:2003 Radiated Emissions
IEC 61000-3-2, Harmonics
IEC 61000-3-3 Voltage Fluctuation and Flicker
IEC 61000-4-2 Electrostatic Discharge
IEC 61000-4-3 Radiated Immunity
IEC 61000-4-4 Electrical Fast Transient/Burst, Power Leads
IEC 61000-4-5 Surge Immunity, Power Leads
IEC 61000-4-6 Conducted Immunity, Power Leads
IEC 61000-4-11 Voltage Dips, Interrupts and Variations
2011/65/EU RoH52 DIRECTIVE
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause undesired operation.

Stabilized Deuterium UV Light Source Chapter 8: Certifications and Compliances
Rev A, January 22, 2018 Page 17

Stabilized Deuterium UV Light Source Chapter 9: Regulatory
Page 18 CTN011088-D02
Chapter 9 Regulatory
As required by the WEEE (Waste Electrical and Electronic Equipment Directive) of the European Community and
the corresponding national laws, Thorlabs offers all end users in the EC the possibility to return “end of life” units
without incurring disposal charges.
This offer is valid for Thorlabs electrical and electronic equipment:
Sold after August 13, 2005
Marked correspondingly with the crossed out “wheelie bin” logo (see right)
Sold to a company or institute within the EC
Currently owned by a company or institute within the EC
Still complete, not disassembled and not contaminated
As the WEEE directive applies to self-contained operational electrical and electronic
products, this end of life take back service does not refer to other Thorlabs products, such as:
Pure OEM products, that means assemblies to be built into a unit by the user (e. g. OEM laser driver cards)
Components
Mechanics and optics
Left over parts of units disassembled by the user (PCB’s, housings etc.).
If you wish to return a Thorlabs unit for waste recovery, please contact Thorlabs or your nearest dealer for further
information.
Waste Treatment is Your Own Responsibility
If you do not return an “end of life” unit to Thorlabs, you must hand it to a company specialized in waste recovery.
Do not dispose of the unit in a litter bin or at a public waste disposal site.
Ecological Background
It is well known that WEEE pollutes the environment by releasing toxic products during decomposition. The aim of
the European RoHS directive is to reduce the content of toxic substances in electronic products in the future.
The intent of the WEEE directive is to enforce the recycling of WEEE. A controlled recycling of end of life products
will thereby avoid negative impacts on the environment.
Wheelie Bin Logo