Distributed Feedback (DFB):
Distributed Feedback (DFB) Quantum Cascade Lasers are fixed wavelength single mode diode lasers. Typical geometrical sizes of the laser chip are 4000µm x 500µm x 200µm (length x width x height). The laser chip is grown by MOVPE of compound semiconductor material. The optical gain is provided by double heterostructure which include several Quantum Wells for electronic confinement. Typcal emitter width range between 5µm and 10µm. The single mode emission is enforced by a Bragg grating with the laser chip. The surfaces of the laser chip act as cavity mirrors due to the difference of the refractive index of the laser material and the surrounding air. The rear facet of the laser chip is provided with a high reflection coating. The front facet of the laser chip is provided with a high quality antireflection coating  for avoiding the Fabry Perot modes of the laser chip. Distributed Feedback (DFB) Quantum Cascade Lasers are available at selected wavelength between 4µm and 12µm.

Packaging Options:
DFB Lasers are available as C-Mount devices or as custom mounted devices upon request.

Customized Wavelength Selection:
Available wavelength range from 4µm to 12µm. Please contact us for the availability of the requested wavelength.