Vertical-cavity surface-emitting laser with an intracavity quantum-well optical absorber
First Claim
1. A laser, comprising:
- a first contact to receive an active region control signal;
a second contact to receive an optical absorber control signal;
a sandwich of distributed Bragg reflector mirror stacks, each distributed Bragg reflector mirror stack having an alternate doping with respect to an adjacent distributed Bragg reflector mirror stack;
an active region positioned in said sandwich to provide optical gain in response to said active region control signal; and
an optical absorber positioned in said sandwich, said optical absorber having wavelength dependent absorption responsive to said optical absorber control signal, thereby selectively producing negative differential resistance in said optical absorber.
3 Assignments
0 Petitions
Accused Products
Abstract
A laser comprises a first contact to receive an active region control signal, a second contact to receive an optical absorber control signal, and a sandwich of distributed Bragg reflector mirror stacks. Each distributed Bragg reflector mirror stack has an alternate doping with respect to an adjacent distributed Bragg reflector mirror stack. An active region is positioned in the sandwich to provide optical gain in response to the active region control signal. An optical absorber is positioned in the sandwich. The optical absorber has wavelength dependent absorption in response to the optical absorber control signal. The device of the invention may be utilized as an integrated detector, a self-pulsating laser, a high speed intracavity modulator, or an optical pick-up device.
-
Citations
20 Claims
-
1. A laser, comprising:
-
a first contact to receive an active region control signal; a second contact to receive an optical absorber control signal; a sandwich of distributed Bragg reflector mirror stacks, each distributed Bragg reflector mirror stack having an alternate doping with respect to an adjacent distributed Bragg reflector mirror stack; an active region positioned in said sandwich to provide optical gain in response to said active region control signal; and an optical absorber positioned in said sandwich, said optical absorber having wavelength dependent absorption responsive to said optical absorber control signal, thereby selectively producing negative differential resistance in said optical absorber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A laser, comprising:
-
a first contact to receive an active region control signal; a second contact to receive an optical absorber control signal; a sandwich of distributed Bragg reflector mirror stacks, each distributed Bragg reflector mirror stack having an alternate doping with respect to an adjacent distributed Bragg reflector mirror stack; an active region positioned in said sandwich to provide optical gain in response to said active region control signal; and an optical absorber positioned in said sandwich, said optical absorber producing an optical absorber band edge (λ
abs) that is less than the Fabry-Perot wavelength (λ
FP) to produce negative differential resistance in said optical absorber. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
-
Specification