Structure and manufacturing method for single-wavelength and...

Details Structure and manufacturing method for single-wavelength and... Structure and manufacturing method for single-wavelength and...

2006-03-14

2006-03-14

Vannucci, James (Department: 2828)

Coherent light generators

Particular active media

Semiconductor

C372S096000

Reexamination Certificate

active

07012944

ABSTRACT:
A single-wavelength distributed feedback (DFB) laser structure is provided. The laser structure having two sections includes an active-material layer for generating a laser having a wavelength in a specific range, two cladding layers respectively covering an upper and a bottom sides of the active-material layer for forming a waveguide structure, a phase shift layer having a specific thickness for controlling a difference between Bragg wavelengths of the two sections, a wet-etching stop layer positioned between the active-material layer and the phase shift layer, and a grating layer having a specific period for determining an illuminating wavelength, wherein a difference between the two sections is an existence of the phase shift layer thereon, and the existence of the phase shift layer causes a difference of the effective refractive indices between the two sections so as to generate a fixed difference between Bragg wavelengths of the two sections.

REFERENCES:
patent: 5536085 (1996-07-01), Li et al.
patent: 5878066 (1999-03-01), Mizutani et al.
patent: 6208793 (2001-03-01), Hillmer et al.
patent: 6638773 (2003-10-01), Hwang et al.
patent: 6728290 (2004-04-01), Coleman et al.

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