Detuned duo-cavity laser-modulator device and method with detuning selected to minimize change in reflectivity

US7508858B2 · kind B2 · utility

Assignee

• The Research Foundation of the State University of New York · US

Inventors

• Serge Oktyabrsky · Rexford, US
• Vadim Tokranov · Cohoes, US
• Michael Yakimov · Ballston Lake, US
• Jobert VanEisden · Albany, US
• Edris M. Mohammed · Hillsboro, US
• Ian Young · Pleasanton, US

Key dates

• Filing date: Apr 30, 2007
• Grant date: Mar 24, 2009
• Expiry date: Apr 30, 2027

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S2301/176
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A detuned duo-cavity laser-modulator device and method are provided which include lower, middle and upper reflectors, a gain region and an absorber region integrated into a semiconductor die. The middle reflector is disposed between the lower and upper reflectors. Together, the lower and middle reflectors define a first resonant cavity, while the upper and middle reflectors define a second resonant cavity. A gain region is disposed within a laser cavity of the resonant cavities to generate an optical carrier wave, while an absorber region is disposed within a modulator cavity of the resonant cavities to modulate a signal on the optical carrier wave. The laser and modulator cavities are detuned resonant cavities, with the detuning of the laser and modulator cavities being selected to minimized change in reflection from the modulator cavity to the laser cavity when the absorber region modulates the signal on the optical carrier wave.