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SLED for OCT Applications

Photonics.com
Aug 2011
EXALOS AGRequest Info
 
SCHLIEREN, Switzerland, Aug. 11, 2011 — Exalos AG has introduced a fiber-coupled and cooled superluminescent light-emitting diode (SLED) centered at ~1060 nm and matching the water absorption window. With a typical 3-dB optical bandwidth of 70 nm and high optical output power of 20 mW, the SLED EXS210010 is suited for optical coherence tomography (OCT) and other imaging applications requiring a light source in the near-IR.

Electrostatic discharge protection features are included in the 14-pin butterfly package.

Compared with retinal analysis with SLEDs in the 800-nm regime, examination with a center wavelength of 1060 nm has advantages, including deeper penetration into the choroid with choroidal/sclera interface detection, choroidal penetration independent of fundus pigmentation, and better retinal OCT performance in cataract eyes.

For customers requiring bandwidths broader than 70 nm, the company offers broadband light sources with spectrally combined SLEDs to achieve 3-dB bandwidths of 110 nm and 10-dB bandwidths of 130 nm. The EXS210010 is available as a turnkey R&D benchtop system or as an OEM unit for easy system integration.

With high-power SLEDs centered at around 1060 nm, customers can choose between two of the company’s technologies: SLEDs for spectrometer-based OCT applications and swept sources for high-speed OCT systems.

SLEDs combine features of laser diode and LED technologies: All SLED devices exhibit low coherency compared with laser diodes, from small emission areas compared with LEDs. An SLED is a temporal incoherent, spatially coherent light source.

All components and fabrication and assembly processes used for the production of the SLEDs are compliant with the RoHS directive 2002/95/EC.


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GLOSSARY
superluminescent light-emitting diode
An emitter based on stimulated emission with amplification but insufficient feedback for oscillation to build up.
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