Coherent light generators – Optical fiber laser
Patent
1994-12-29
1995-12-05
Scott, Jr., Leon
Coherent light generators
Optical fiber laser
372 92, 372 69, 372102, 372 41, 372 39, H01S 330
Patent
active
054736226
ABSTRACT:
A master oscillator and power amplifier configuration for a high power cladding-pumped laser structure, and a method of making same, is disclosed. The laser structure comprises a single mode core having at least one oscillator defined therein, and a first and second cladding layer for waveguiding and radiation retention. The core is doped with refractive-index modifying dopants, in addition to ionized rare earth elements. The refractive-index modifying dopants facilitate writing one or more spaced pairs of index gratings in the core, each pair defining an oscillator. Oscillator cavity length is determined by the desired mode spacing and is less than one-half of the single mode core length. The index gratings are formed via a ultraviolet light-induced refractive index change in the core, which index change varies periodically along the core. The periodic variation is created by projecting an interference pattern on the core.
REFERENCES:
patent: 4815079 (1989-03-01), Snitzer et al.
patent: 5268910 (1993-12-01), Huber
patent: 5305335 (1994-04-01), Ball et al.
patent: 5317576 (1994-03-01), Leonberger et al.
patent: 5323404 (1994-06-01), Grubb
Erdogan, T., and Mizrahi, V., "Fiber Phase Gratings Reflect Advances in Lightwave Technology," Rprinted from the Feb. 1994 edition of Laser Focus World, 4 pages.
AT&T Corp.
Jr. Leon Scott
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