Create an Account  |   Log In

View All »Matching Part Numbers

Your Shopping Cart is Empty

Extended Broadband SLD Light Source

  • Dual SLD Light Source for Broadband Spectral Applications
  • Ideal for High-Resolution OCT Systems
  • Three High-Power Fiber-Coupled Output Channels


(Fiber Patch Cables Not Included)

Related Items

Please Wait
Key Specificationsa
Matched-Pair SLD Characteristics
Channel/SLD Output A B A+B
Central Wavelength (Typ.) 1225 nm 1340 nm 1300 nm
FWHM Bandwidth (Typ.) 80 nm 110 nm 200 nm
(170 nm Min)
10 dB Bandwidth (Typ.) 100 nm 150 nm 235 nm
Fiber-Coupled Power >10 mW per Channel
Noise (Typ.) <0.2% (Source Dependent)
Controller Characteristics
Adjustment Range 0 - Full Power
Temperature Control 14.00 to 30.00 °C
Operating Temperature 10 - 30 °C
Fiber/Connector SMF-28e, FC/APC
  • Please refer to the Specs tab for full specifications.


  • Superluminescent Diodes (SLDs) Tuned for OCT Applications
  • Dual SLD Light Source for Broadband Spectral Output
  • Three Output Channels (See Table to the Right)
  • 1300 nm Center Wavelength (Combined Channel A+B)
  • >10 mW Output per Channel
  • FC/APC Connectors
  • Each SLD can be Independently Controlled
  • Control via Front Panel or USB Interface

Thorlabs has partnered with Praevium Research to develop the LS2000C Extended Bandwidth SLD Light Source. In OCT imaging systems, the optical bandwidth of the light source is inversely proportional to the axial resolution. To provide higher axial resolution than currently possible with a single SLD, this source combines the output of a matched pair of SLDs to provide a single light source with an extended bandwidth ideal for high resolution OCT imaging applications.

The matched-pair SLDs have offset emission spectra, selected such that their combined output provides broadband emission with peak-to-valley intensity differences of less than 3 dB, as illustrated in the Channel A+B spectrum below.

The source offers three FC/APC fiber connectors on the front panel of the LS2000C. The first two channels provide access to the output of the two independent SLDs, while the third channel provides extended bandwidth output by combining the output of the two SLDs. The combined channel has a bandwidth of >170 nm and output power greater than 10 mW from each channel. Channels A and B can operate simultaneously, while Channel A+B must be run independently of the others.

The LS2000C Extended Broadband SLD Light Source packages the matched-pair SLDs into a single compact housing. Like our other 1300 nm SLD for OCT, these SLDs have an integrated isolator, thermistor, and TEC element for optimal performance. The LS2000C front panel provides independent control of the output of each SLD. Additionally, the front panel of the unit has an enable/disable output button for each SLD as well as a reset button to return the device to the factory presets.

The LS2000C SLD light source can be completely controlled using either the front panel interface or through a PC via the USB connection on the back of the unit. When using the USB interface, the source can be controlled with the provided software as well as through command line language.

OCT Scan of an Onion Skin

This extended light source can be used in OCT imaging systems to produce images with a resolution of ~3 μm in biological (n = 1.33) samples. The images below demonstrate the increased resolution obtained when the light source is switched from a 90 nm bandwidth single SLD source to a 200 nm extended bandwidth SLD source.

Image Taken Using a 90 nm Bandwidth SLD
Onion Skin from 90nm SLD
Image Taken Using a 200 nm Extended Bandwidth SLD
Onion Skin from 200 nm LS2000B

OCT Imaging with a 90 nm bandwidth (FWHM) source provides ~9 μm of axial resolution, as demonstrated in the top image of an onion skin. Incorporating an extended broadband SLD, based on matched-pair SLD light sources that together provide a bandwidth of 200 nm (typical, FWHM), enables imaging at axial resolutions less than 4 μm, as demonstrated above. The higher resolution provided by the extended broadband SLD enables visualization of distinct layers in the onion skin.

Optical Performance Specifications
Channel 1 2 3
Central Wavelength (Typ.) 1225 nm 1340 nm 1300 nm
FWHM Bandwidth (Typ.) 80 nm 110 nm 200 nm
(170 nm Min)
10 dB Bandwidth (Typ.) 100 nm 150 nm 235 nm
Fiber-Coupled Power >10 mW per Channel
Noise (Typ.) <0.2% (Source Dependent)
Electrical Performance Specifications
Current Set point Resolution 0.1 mA
Temperature Adjust Range 14.00 to 30.00 °C
Temp Set point Resolution ±0.01 °C
General Specifications
AC Input 100 - 240 VAC, 50 - 60 Hz
Input Power 65 VA (Max)
Fuse Ratings 500 mA
Fuse Type IEC60127-2/III (250 V, Slow Blow Type ‘T’)
Fuse Size 5 mm x 20 mm
Dimensions (W x H x D) 12.6" x 2.5" x 10.6"
(320 mm x 64 mm x 269 mm)
Weight 7.3 lbs (3.3 kg)
Operating Temperature 10 to 30 °C
Storage Temperature 0 to 50 °C
Connections and Controls
Interface Control Optical Encoder with Pushbutton
Enable and Laser Select Keypad Switch Enable with LED indication
Power On Key Switch
Fiber/Connector SMF-28e, FC/APC
Use Item # FCC-7020 for Cleaning (Included)
Display LCD, 16 x 2 Alphanumeric Characters
Input Power Connection IEC Connector
Interlock 2.5 mm Mono Phono Jack
Communications Port USB 2.0
Connection USB Type B Connector
Cable (Included) 2 m USB Type A to Type B Cable
(Replacement Item # USB-A-79)

Computer Interface

USB Type B

USB Type B

USB Type B to Type A Cable Included

Please Give Us Your Feedback
Email Feedback On
Contact Me:
Your email address will NOT be displayed.
Please type the following key into the field to submit this form:
Click Here if you can not read the security code.
This code is to prevent automated spamming of our site
Thank you for your understanding.
Would this product be useful to you?   Little Use  1234Very Useful

Enter Comments Below:
Characters remaining  8000   
Posted Comments:
No Comments Posted
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
LS2000C Support Documentation
LS2000CExtended Bandwidth SLD Source, 1325 nm, Bandwidth > 170 nm
Lead Time
Log In  |   My Account  |   Contact Us  |   Careers  |   Privacy Policy  |   Home  |   FAQ  |   Site Index
Regional Websites:East Coast US | Europe | Asia | China | Japan
Copyright 1999-2018 Thorlabs, Inc.
Sales: 1-973-300-3000
Technical Support: 1-973-300-3000

High Quality Thorlabs Logo 1000px:Save this Image