Tunable laser

Details Tunable laser Tunable laser

2008-04-29

2008-04-29

Harvey, Minsun Oh (Department: 2828)

Coherent light generators

Particular resonant cavity

Specified cavity component

C372S020000, C372S050110

Reexamination Certificate

active

11235250

ABSTRACT:
A tunable laser includes an optical waveguide alternately including a gain waveguide portion and a wavelength controlling waveguide portion, and a diffraction grating. The diffraction grating includes a gain diffraction grating and a wavelength controlling diffraction grating. A wavelength controlling region is configured such that the wavelength controlling waveguide portion and the wavelength controlling diffraction grating are included therein. A gain region is configured such that the gain waveguide portion and the gain diffraction grating are included therein. The Bragg wavelength of the wavelength controlling region is longer than that of the gain region in a state in which current injection or voltage application is not performed for the wavelength controlling waveguide portion.

REFERENCES:
patent: 4665528 (1987-05-01), Chinone et al.
patent: 4932034 (1990-06-01), Usami et al.
patent: 5177758 (1993-01-01), Oka et al.
patent: 5274649 (1993-12-01), Hirayama et al.
patent: 5358898 (1994-10-01), Ogita et al.
patent: 5379318 (1995-01-01), Weber
patent: 5808314 (1998-09-01), Nakajima et al.
patent: 5838714 (1998-11-01), Delorme
patent: 7106765 (2006-09-01), Carter et al.
patent: 0 267 667 (1988-05-01), None
patent: 0 487 351 (1992-05-01), None
patent: 0 608 729 (1994-08-01), None
patent: 0 926 787 (1999-06-01), None
patent: 4-147686 (1992-05-01), None
patent: 7-273400 (1995-10-01), None
patent: 9-36480 (1997-02-01), None
patent: 2004-235600 (2004-08-01), None
R. Paoletti, et al.; “Small chip size, low power consumption, fully electronic controlled tunable laser source with 40 nm tuning range and 20 mW output power for WDM applications;”ECOC-IOOC 2003 Proceedings; vol. 4; Paper Th1.2.4; 2003; pp. 886-887./Discussed in the specification.
Y. Kotaki, et al.; “Tunable, Narrow-Linewidth and High-Power λ/4-Shifted DFB Laser;”Electronics Letters; vol. 25; No. 15; Jul. 20, 1989; pp. 990-992./Discussed in the specification.
Patent Abstract of Japan vol. 011, No. 108 (E-495), Apr. 4, 1987 & JP 61 255085 A (Mitsubishi Electric Corp), Nov. 12, 1986 abstract figure 1.
European Search Report dated Feb. 16, 2006.

Affiliated with

Also associated with

Rating

Tunable laser does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tunable laser, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tunable laser will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3915892