Optical apparatus using wavelength selective photocoupler

Details Optical apparatus using wavelength selective photocoupler Optical apparatus using wavelength selective photocoupler

1991-11-22

1992-08-18

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250226, 372 50, 385 50, H01J 4014

Patent

active

051401495

ABSTRACT:
The present invention relates to optical apparatus such as a photosensor, a semiconductor laser, an optical amplifier in which a wavelength selective photocoupler is used so as to couple two waveguides through a diffraction grating.
A photosensor which is one of the optical apparatus according to the present invention comprises a substrate, a first waveguide layer formed on the substrate, a second waveguide layer formed on the first waveguide layer to be stacked in a direction of thickness and which has a guided mode difference from that of the first waveguide layer, a diffraction grating formed on an overlapping region of the guided modes of the first and second waveguide layers and which couples light components of a specific wavelength range of light propagating through the first waveguide layer to the second waveguide layer, a light absorption layer for absorbing at least some light components of the light components coupled to the second waveguide layer, and an electrode for converting the light components absorbed by the light absorption layer into an electrical signal and outputting the electrical signal.

REFERENCES:
patent: 4680769 (1987-07-01), Miller
patent: 4730327 (1988-03-01), Gordon
patent: 4747650 (1988-05-01), Sakuda
patent: 4755015 (1988-07-01), Uno et al.
patent: 4776661 (1988-10-01), Handa
patent: 4811352 (1989-03-01), Suzuki et al.
patent: 4843609 (1989-06-01), Ohya et al.
patent: 4852961 (1989-08-01), Yamamoto et al.
patent: 4904045 (1990-02-01), Alferness et al.
R. C. Alferness et al., Appl. Phys. Lett. 33, p. 161 (1978).
Study Report OQE81-129, Institute of Electronics and Communications Engineers of Japan, Miki et al.
R. C. Alferness et al., Integrated and Guided-Wave Optics Technical Digest Series, vol. IV, pp. 215-218 (1989).
R. C. Alferness et al., Appl. Phys. Lett. 55, pp. 2011-2013 (1984).
"Directional Couplers Made of Nonidentical Asymmetric Slabs. Part II: Grating-Assisted Couplers", by D. Marcuse, Journal of Lightwave Technology, vol. LT-5, No. 2, pp. 268-273 (1987).
"III-V Heterostructure Devices for Integrated Optics", by J. L. Merz, Optical Engineering, vol. 19, No. 4, pp. 581-586 (1980).
"Interlayer-Directionally Grating-Coupled III-V Arrow Structures for Integrated Opto-electronics", by T. L. Koch et al., Topical Meeting on Semiconductor Lasers, Feb. 10-11, 1987, Albuquerque, N.M., pp. 24-26.
"Integrated Waveguide Coupler", by F. L. Galeener et al., Xerox Disclosure Journal, vol. 4, No. 3, pp. 361-362 (1979).

Affiliated with

Also associated with

Rating

Optical apparatus using wavelength selective photocoupler does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical apparatus using wavelength selective photocoupler, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical apparatus using wavelength selective photocoupler will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1250353