Parabolic waveguide-type collimating lens with tunable...

Details Parabolic waveguide-type collimating lens with tunable... Parabolic waveguide-type collimating lens with tunable...

2007-10-16

2007-10-16

Wood, Kevin S. (Department: 2874)

Optical waveguides

With optical coupler

Input/output coupler

C385S031000, C385S033000, C372S102000, C372S101000

Reexamination Certificate

active

11654112

ABSTRACT:
The present invention relates to a semiconductor based parabolic waveguide-type collimating lens and a monolithically integrated type tunable external cavity laser diode light source. The monolithically integrated type tunable external cavity laser diode light source includes a gain medium for generating a gain of an optical signal, a collimating lens for correcting an divergent light beam to a parallel light beam, a passive waveguide through which the parallel light beam travels, an optical deflector to change a traveling direction of the parallel light beam changing a refractive index of medium on a traveling path of the parallel light beam traveling through the slab waveguide in response to an external electric signal and a diffraction grating to diffract the parallel light beam passing through the optical deflector, wherein these are integrate into one substrate made of an InP-based semiconductor as well as a material such as a GaAs-based semiconductor, a Si-based semiconductor, LiNbO3-based semiconductor or the like.

REFERENCES:
patent: 6810047 (2004-10-01), Oh et al.
patent: 6947625 (2005-09-01), Nishizawa et al.
patent: 7027670 (2006-04-01), Aoki
patent: 7197208 (2007-03-01), Trutna, Jr. et al.
patent: 2006/0001884 (2006-01-01), Tani et al.

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