Trw Limited

Robert W Lodenkamper

Michael G Wickham

Timothy A Vang

Srinath Kalluri

Doyle T Nichols

Michael P Nesnidal

A waveguide ( ) is provided having a two-dimensional optical wavelength Bragg grating ( ) embedded within a semiconductor laser medium ( ). More particularly, the waveguide ( ) includes an active region ( ) sandwiched between n-doped and p-doped cladding layers ( ). The two-dimensional Bragg grating ( ) is formed in the active region ( ). Upper and lower electrodes ( ) are defined on opposite sides of the cladding layers ( ) to complete the waveguide structure ( ). The two-dimensional grating ( ) provides simultaneous frequency selective feedback for mode control in both the longitudinal and lateral directions.

High power single mode semiconductor lasers and optical amplifiers using 2D Bragg gratings

An injection locking system for lasers. In particular, a signal from a master laser is phase modulated and injected into a slave laser. The phase difference &phgr; is maintained at zero by way of a phase locked loop. By maintaining the phase difference &phgr; at zero, the frequency drift is compensated by maintaining the frequency within a predetermined locking range.

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Rancho Palos Verdes, CA, United States of America

Robert W Lodenkamper