Photonic integration using a twin waveguide structure

Details Photonic integration using a twin waveguide structure Photonic integration using a twin waveguide structure

1997-02-07

1999-01-12

Bovernick, Rodney B.

Coherent light generators

Particular active media

Semiconductor

372 19, 385 50, 385 28, 385 29, 385131, 438 31, H01S 319, H01S 3098, G02B 626, G02B 610

Patent

active

058598669

ABSTRACT:
A monolithically integrated vertical twin-waveguide structure reduces the sensitivity of the device performance characteristics due to the laser cavity length and variations in the layer structure. This is achieved by the introduction of an absorption or loss layer between the active and passive regions. This layer eliminates the propagation of the even mode, while having minimal effect on the odd mode. The threshold current densities and differential efficiencies of the devices are unaffected by the loss layer. A coupling efficiency of 45% from the laser to the external passive waveguide is obtained.

REFERENCES:
patent: 5140149 (1992-08-01), Sakata et al.
patent: 5208878 (1993-05-01), Thulke
patent: 5325379 (1994-06-01), Amann
patent: 5499259 (1996-03-01), Makita
patent: 5511084 (1996-04-01), Amann
patent: 5568311 (1996-10-01), Matsumoto

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