Multimode light generating module, semiconductor laser...

Details Multimode light generating module, semiconductor laser... Multimode light generating module, semiconductor laser...

2005-09-13

2005-09-13

Wong, Don (Department: 2821)

Coherent light generators

Particular resonant cavity

Specified cavity component

C372S006000, C372S109000, C385S088000

Reexamination Certificate

active

06944203

ABSTRACT:
A multimode light generating module comprises an optical cavity and a light-receiving element. The optical cavity is constituted by a semiconductor optical amplification element, and an optical fiber having a grating. The optical fiber comprises a grating having an apodized periodic refractive index distribution, and the slope of the reflection spectrum in a longer wavelength region with respect to the peak wavelength λpis gentler than that in the shorter wavelength region therewith. The grating satisfies the relationship of 0.5 nm>λ0.2−λp>0.1 nm. Here, λ0.2is defined by λ0.2h-λ0.2l, where λ0.2his the longer one of two wavelengths exhibiting a relative reflectivity of 0.2 with respect to the maximum reflectivity, and λ0.2lis the shorter one of two wavelengths exhibiting a relative reflectivity of 0.2 with respect to the maximum reflectivity.

REFERENCES:
patent: 5845030 (1998-12-01), Sasaki et al.
patent: 5993073 (1999-11-01), Hamakawa et al.
patent: 6647038 (2003-11-01), Althaus et al.
patent: 2003/0067952 (2003-04-01), Tsukiji et al.
patent: 2004/0213304 (2004-10-01), Zemmouri et al.
patent: P2001-185807 (2001-07-01), None
patent: 2001-185807 (2004-06-01), None

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