• Superluminescent Diode (SLD) Tuned for OCT Applications
• Dual SLD Light Sources for Broadband Spectral Output
• Four High-Power, Fiber-Coupled, Output Channels
• Ideal for High Resolution OCT Systems
• 1300 nm Center Wavelength
• 10 mW Output/Channel
• FC/APC Connector
• Independent Operation for Each SLD
• Controls on Front Panel and via USB Interface

Thorlabs LS2000B superluminescent diode (SLD) light source is designed for OCT applications. 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, the LS2000B features a dual SLD arrangement. This dual SLD feature produces an extended broadband SLD light source ideal for high resolution OCT imaging applications. The LS2000B SLD light source can be completely controlled using the front panel interface, however the unit can also be controlled through a PC via the USB connection on the back of the unit. The LS2000B can be controlled through the provided software as well as through command line language via the USB port.

The SLDs are designed so that their emission spectra are offset yet, when combined (matched-pair), the deviation from normal Gaussian distribution based on that offset is minimized to less than 3 dB. The output of the two fiber-pigtailed SLDs are fiber coupled to provide a single extended bandwidth (200 nm, typical) light source.

The LS2000B extended broadband SLD light source packages the matched-pair SLDs into a single compact housing. The LS2000B has an integrated isolator, thermistor, and TEC element for optimal performance. The front panel provides independent control of the output of each SLD. In addition, each SLD has a front panel enable/disable output button as well as a reset to the factory configuration. There are four FC/APC fiber connectors in the front panel of the LS2000B. The first two channels access the output of the two independent SLDs; the remaining two channels provide extended bandwidth output by combining the output of the two SLDs. Each combo-channel will have a bandwidth greater than 170 nm and output power greater than 10 mW from each channel. The LS2000B can operate two channels, 1 and 2 or 3 and 4, simultaneously.

• Optical Performance Specifications
• SLD Output: SLD A (Chan 1), SLD B (Chan 2), SLD A+SLD B (Chan 3 & 4)
• Central Wavelength (typical): 1225 nm (Chan 1), 1340 nm (Chan 2), 1300 nm (Chan 3 & 4)
• FWHM Bandwidth (Typical) [Min Bandwidth]: 80 nm (Chan 1), 110 nm (Chan 2), 200 nm[170 nm] (Chan 3 & 4)
• 10 dB Bandwidth (Typical): 100 nm (Chan 1), 150 nm (Chan 2), 235 nm (Chan 3 & 4)
• Fiber-Coupled Power: >10 mW/channel
• Noise (Typical): <0.2% (Source Dependent)
• Connections and Controls
• Interface Control: Optical Encoder with Pushbutton
• Enable and Laser Select: Keypad Switch Enable with LED Indication
• Fiber Ports: FC/APC
• Communication Connection: USB Type B connector
• Interlock: 2.5 mm Mono Phono Jack