Hybrid gain guiding in laser resonators

Details Hybrid gain guiding in laser resonators Hybrid gain guiding in laser resonators

2011-02-01

2011-02-01

Harvey, Minsun (Department: 2828)

Coherent light generators

Optical fiber laser

C372S071000, C372S075000

Reexamination Certificate

active

07881347

ABSTRACT:
Methods and systems for hybrid gain guiding in laser resonators that combines the features of gain guiding and fiber or other types of lasers into a single system. Hybrid gain guiding in laser resonators is not limited to conventional fiber lasers. Any type of gain guided fiber, index guided or anti-guided, is used as an intracavity element to induce loss on high order modes in an otherwise multimode laser system. The gain guided element contributes little gain to the laser oscillator but allows only the lowest order mode to transmit without loss. When the gain guiding fiber length is selected so the loss for a particular cavity mode is greater than the gain, the cavity mode does not lase. Since the gain guiding fiber induces loss for all laser modes other than the lowest order mode it makes sure that the mode one higher than the lowest order mode does not lase and as a result, no other cavity modes lase.

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