KED & Associates LLP
Semiconductor optoelectronic device with improved beam quality
A tilted wave semiconductor diode laser containing additional structural elements that improve beam quality is provided. The tilted wave laser includes a narrow active waveguide coupled to a broad passive waveguide, and light generated in the active waveguide leaks to the broad waveguide and propagates in it in the form of a tilted optical wave. The device emits laser light coming out from the broad waveguide in the form of one or two narrow beams. The additional structural elements may include grooves intersecting the narrow waveguide and a stripe that suppress undesired emission from the narrow waveguide; grooves that extend parallel to the stripe that suppress parasitic lateral optical modes; unpumped sections of the stripe that suppress light emission from the narrow waveguide; and facet coatings having distinct reflectance for the light in the narrow and in the broad waveguides thus suppressing emission of light from the narrow waveguide.
PBC Lasers GmbH
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Nikolai Vitaly
Ledentsov Shchukin