Semiconductor polarization mode converter having a diffraction g

Details Semiconductor polarization mode converter having a diffraction g Semiconductor polarization mode converter having a diffraction g

1998-07-07

2000-08-15

Henry, Jon

Optical waveguides

With optical coupler

Particular coupling function

385 2, 385 8, 385 9, 385131, 372102, G02B 634, G02F 1365, H01S 3063

Patent

active

06104850&

ABSTRACT:
A semiconductor TE/TM mode converter comprises a semiconductor waveguide layer including a compressive-strained first region and a tensile-strained second region, and a diffraction grating formed on the first region. The first region and second region are reversed-biased and forward-biased, respectively. TE mode light incident on the facet of the first region generates TM mode light outgoing from the facet of the second region. The diffraction grating in the first region has selective reflectance against TM mode light and reflects the TM mode light toward the second region, to lower the lasing threshold of TM mode light and raise the conversion efficiency.

REFERENCES:
patent: 5946336 (1999-08-01), Mizutani et al.
Herwig Kogelnik, "Couple Wave Theorgy for Thick Hologram Gratings", The Bell System Technical Journal, vol. 48, No. 9, Nov. 1969, pp. 2909-2947, Nov. 1969.

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