Quantum well infrared photo detector and monolithic chopper

Details Quantum well infrared photo detector and monolithic chopper Quantum well infrared photo detector and monolithic chopper

1995-06-05

1997-08-26

Epps, Georgia Y.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

250332, G02F 103

Patent

active

056615906

ABSTRACT:
A quantum well infrared photodetector and modulator are monolithically integrated to one another. The infrared scene impinges on an infrared receiving element such as a phase grating, which couples it to a modulator. The modulator includes asymmetric quantum wells which are shifted by an applied bias. By appropriately adjusting the bias, the modulator can pass a maximum amount of the input information or can pass less. The photodetector and modulator both use the same kinds of materials, preferably GaAs and Al.sub.x Ga.sub.1-x As, so they essentially become a single unit, obtaining better noise and operating characteristics from the combination.

REFERENCES:
patent: 3831033 (1974-08-01), Hill
patent: 4001635 (1977-01-01), d'Aruia
patent: 4637122 (1987-01-01), Carney
patent: 4786918 (1988-11-01), Thornton
patent: 4831629 (1989-05-01), Paoli
patent: 4860304 (1989-08-01), Mooradian
patent: 4940303 (1990-07-01), Abeles
patent: 4953166 (1990-08-01), Mooradian
patent: 4988153 (1991-01-01), Paek
patent: 5007690 (1991-04-01), Chern
patent: 5023685 (1991-06-01), Bethea et al.
patent: 5115335 (1992-05-01), Soref
patent: 5115445 (1992-05-01), Mooradian
patent: 5126263 (1992-06-01), Cocking
patent: 5228050 (1993-07-01), LaCourse
patent: 5267255 (1993-11-01), Paoli
patent: 5412499 (1995-05-01), Chiu et al.
patent: 5485014 (1996-01-01), Jain et al.
patent: 5519529 (1996-05-01), Ahearn et al.

Affiliated with

Also associated with

Rating

Quantum well infrared photo detector and monolithic chopper does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Quantum well infrared photo detector and monolithic chopper, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum well infrared photo detector and monolithic chopper will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1992091