Integrated coherent transceiver
AssigneeUniversity of Maryland, Baltimore County
InventorFow-Sen Choa
Life of this patent
Estimating the term…
Abstract
An integrated coherent transceiver capable of being operated with only one below threshold FP mode is described which can be used for both receiving downstream signals and transmitting upstream signals with either FSK or ASK format. The device allows the full tuning range of distributed-Bragg-reflector ("DBR") lasers to be utilized to achieve approximately one thousand channels in a local access system with 1 GHz channel spacing. The sensitivity can be further enhanced by obtaining balanced operation (without changing the simple device structure) to cancel the laser intensity noise.
Claims13
An integrated coherent laser transceiver capable of receiving downstream and transmitting upstream laser signals, comprising:
- a local oscillator cavity including a gain section, a phase section, and a grating section, said cavity configured so as to have only one below threshold FP mode in the cavity;
- a detector section;
- and
- means for biasing said detector section.
An integrated semiconductor coherent laser transceiver comprising:
- a semiconductor waveguide;
- a local oscillator cavity formed on said semiconductor waveguide, said local oscillator including a gain section, a phase section, and a grating section;
- and
- a detector section formed at on an end of said semiconductor waveguide.
An integrated coherent laser transceiver comprising:
- a semiconductor waveguide;
- a combined local oscillator cavity and signal mixer, said combined local oscillator cavity and signal mixer including a gain section, a phase section, and a grating section all formed on said waveguide;
- and
- a detector formed at an end of said waveguide.
Dependencies are inferred from the claim text.