Semiconductor Laser Source with Electrically Tunable Emission Wavelength

A tunable semiconductor with novel wavelength adjusting technology


An adjustable semiconductor light source, such as lasers or light diodes, have a high demand for variable wavelengths in a controllable manner. Although there are methods to change the wavelength of a light beam, they are either impractical or uncontrollable. There is a need for an emission source which allows wide range electrical tuning of the emission wavelength for both laser and LED operation modes.

Technology Overview:

This tunable semiconductor is comprised of an optically active region with at least one cascaded stage. This cascaded stage has an injection section and an active section, which are separated by a barrier layer. They have multiple quantum well and barrier layers. Each active section supports electronic states, providing a lasting optical transition. A voltage is applied to the optically active region in order to pump electrons through it. By changing the voltage applied to the optically active region, the wavelengths can be modulated in the lasting optical transition. There is an area located on one side of the optically active region which has a grating structure; this allows wavelength selective reflections of optical waves to spread through the optically active region. A means for confining these waves to the active section is provided as well.


This technology allows design and implementation of mid‑infrared semiconductor light‑emitting diodes and/or lasers electrically changeable in the wavelength region


Intellectual Property Summary:


Stage of Development:

7,876,795 8,571,082

Licensing Potential:

Development partner,Commercial partner,Licensing

Licensing Status:

Available for licensing. 7762

Additional Information:

semiconductor laser, laser, laser sources, infrared, emitting diode, diode, semiconductor, tunable, defense, remote sensing, sensing, environmental monitoring, light source, laser light, light beams, electrical, led, barrier layer, quantum, optical, grating, waves, sensing semiconductor, semiconductor device, tunable laser, wavelength tuning, mid-infrared, methods, transition

Please note, header image is purely illustrative. Source: SvonHalenbach, Wikimedia Commons, public domain.

Patent Information:
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