SLED Broadband Source

SLED Broadband Source, SLED (SLD) is an edge-emitting semiconductor light source based on superluminescence. It combines the high power and brightness of laser diodes with the low coherence of conventional light-emitting diodes. The emission band of SLED is 5–100 nm wide.

You can find kinds of SLED Broadband optical light source here. 

SLED broadband light sources in bench-top or module package with photonics depolarizer option cover wavelength like 650nm, 750nm, 850nm, 980nm, 1000nm, 1310nm, 1490nm, 1550nm, 1625nm, 1650nm, 1690nm, from 1200nm to 1680nm.

There are many wavelengths, such as 650nm, 980nm, 1650nm etc. And several wavelengths can be made into one, refer to this 1220nm-1680nm SLED. Learn more about SLED or SLD at Wiki. 

Superluminescent diodes

SLEDs occupy a twilight zone between LEDs and laser diodes, with enough of a population inversion to produce stimulated emission but without the feedback to reach the laser threshold and oscillate. First demonstrated by Bell Labs in 1973,2 they have low temporal coherence and wide bandwidth, attractive for some applications. But they took time to become practical.

The development of optical coherence tomography (OCT) in the 1990s created a need for a broadband low-coherence source. Our March 2004 issue reported that superluminescent diodes were being used in commercial OCT systems. SLEDS soon proliferated.

So did other applications. SLEDs sensed both oxygen and ammonia at the Indian Institute of Technology (Chennai, India), we wrote in December 2009. In May 2011 (see Fig. 6), we reported that University of Maryland (College Park, MD) had used SLEDs to generate truly random sequences of numbers by a physical process, attractive for applications ranging from gaming to secure key generation.
 

A combined multiple-SLED broadband light source at 1300 nm for high resolution optical coherence tomography.

The old SLED may be 680nm Series, 820/840nm Series, 935/980nm Series, 1020/1050nm Series, 1310nm Series, 1400nm Series,1550nm Series, 1600nm Series.

Here are some suppliers for the SLED Broadband light source :

EXALOS provide High-performance broadband SLEDs, swept sources and sub-systems.Their SLED source have the following wavelengths: 405nm,650nm,830nm,840nm,860nm,1040nm,1070nm, 1280nm, 1305nm, 1315nm,1460nm,1560nm. And they also provide following products:

SLED Modules
Transceivers
Driver Boards
Broadband Source
Swept Source
Balanced Receiver

DenseLight DL-ASE is a series of all-semiconductor low DOP ASE optical sources with a wide selection of wavelengths, covering the entire telecom spectral bands (from O to U). The CW output standard model comes with excellent stability in output power and spectrum. As it operates on direct light generation from superluminescent principle (SLED), it can be directly intensity modulated. Modulation models are available upon request, as well as custom models to meet your specific needs.

UC INSTRUMENTS GM8035 Superwide CWDM Broadband Light Source 

SLED broadband light sources in bench-top or module package cover wavelength like 650nm, 750nm, 850nm, 980nm, 1000nm, 1310nm, 1490nm, 1550nm, 1625nm, 1650nm, 1690nm, from 1200nm to 1650nm.

SLED broadband light sources in bench-top or module package with photonics depolarizer option cover wavelength like 650nm, 750nm, 850nm, 980nm, 1000nm, 1310nm, 1490nm, 1550nm, 1625nm, 1650nm, 1690nm, from 1200nm to 1650nm. Wide bandwidth SLED sources have higher output power density than LED sources, and they are used for Fiber Bragg Grating-FBG based sensor systems, fiber optics passive component spectrum testing & slicing, DWDM filter testing, and fiber optic measurement instrumentation equipments.

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