Subpicosecond fiber laser

Details Subpicosecond fiber laser Subpicosecond fiber laser

1987-09-30

1989-05-30

Sikes, William L.

Coherent light generators

Optical fiber laser

372 92, 372 94, H01S 330

Patent

active

048357782

ABSTRACT:
A fiber laser for producing subpicosecond pulses is formed by placing a laser fiber in a resonant cavity, in either a linear or closed loop configuration. The laser fiber is formed of two different types of fibers joined in series, a gain fiber which contains the laser gain medium followed by a pulse shaping fiber which uses the phenomenon of solution pulse shaping to shorten the pulses. An initially formed pulse recirculates many times in the resonator; on each pass the pulse is both amplified and shortened until steady state is reached. The zero dispersion wavelength of the pulse shaping fiber is chosen to be slightly less than the laser wavelength. The fiber is pumped by a continuous source, particularly CW laser diodes. The initial pulse can be formed by a self starting technique produced by selecting the proper length of the laser fiber, or else a mode locker/acousto-optic shutter can be placed in the cavity.

REFERENCES:
patent: 4515431 (1985-05-01), Shaw et al.
patent: 4546476 (1985-10-01), Shaw et al.
patent: 4554510 (1985-11-01), Shaw et al.
patent: 4635263 (1987-01-01), Mollenauer
patent: 4637025 (1987-01-01), Snitzer et al.
patent: 4646308 (1987-02-01), Kafka et al.
patent: 4674830 (1987-06-01), Shaw et al.
patent: 4682335 (1987-07-01), Hughes
patent: 4685107 (1987-08-01), Kafka et al.

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