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Optoelectronics

High-performance SLED at 1060 nm for OCT applications: 70 nm spectral width with 20 mW of output power

5th August 2011

EXALOS AG

ES Admin

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EXALOS AG has introduced a new high-performance, fiber-coupled and cooled Superluminescent Light Emitting Diode (SLED) centered around 1060 nm. With a typical 3-dB bandwidth of 70 nm and a high optical output power of 20 mW the SLED EXS210010 is perfectly suited for Optical Coherence Tomography (OCT) or other imaging applications requiring a light source in the near IR.

Key Features:

* Center wavelength of 1060 nm matching the water absorption window
* 3-dB optical bandwidth of 70 nm for similar axial resolution than 840 nm SLEDs
* Output power of 20 mW matching higher MPE levels at 1060 nm compared to 840 nm
* ESD protection features included in the 14-pin BTF package

Compared to retina analysis with SLEDs in the 800 nm regime, examination with a center wavelength of 1060 nm shows some distinct features, amongst others:

* deeper penetration into the choroid with choroidal/sclera interface detection
* choroidal penetration independent of fundus pigmentation
* better retinal OCT performance in cataract eyes

For customers requiring light sources with bandwidths broader than 70 nm for their application, EXALOS is offering broadband light sources with spectrally-combined SLEDs to achieve 3-dB bandwidths of 110 nm and 10-dB bandwidths of 130 nm. This broadband light source can be offered either as a turn-key R&D benchtop system or as an OEM unit for easy system integration.

With high-power SLEDs centered around 1060 nm our customers are now able to choose between two technologies from EXALOS: SLEDs for spectrometer-based OCT applications and swept sources for high-speed OCT systems.