Long pulse production from short pulses

Details Long pulse production from short pulses Long pulse production from short pulses

1993-06-03

1994-08-02

Lee, John D.

Coherent light generators

Particular beam control device

Control of pulse characteristics

359341, 359345, 359347, 385 27, H01S 313

Patent

active

053352360

ABSTRACT:
A method of producing a long output pulse (SA) from a short pump pulse (P), using an elongated amplified fiber (11) having a doped core (12) that provides an amplifying medium for light of one color when driven into an excited state by light of a shorter wavelength and a surrounding cladding 13. A seed beam (S) of the longer wavelength is injected into the core (12) at one end of the fiber (11) and a pump pulse (P) of the shorter wavelength is injected into the cladding (13) at the other end of the fiber (11). The counter-propagating seed beam (S) and pump pulse (P) will produce an amplified output pulse (SA) having a time duration equal to twice the transit time of the pump pulse (P) through the fiber (11) plus the length of the pump pulse (P).

REFERENCES:
patent: 4881790 (1989-11-01), Mollenauer
patent: 4939474 (1990-07-01), Eisenstein et al.
patent: 5096277 (1992-03-01), Kleinerman
patent: 5191628 (1993-03-01), Byron
York brochure for "York DF 1500 amplifier fiber", Feb., 1991, Hampshire, England.
C. R. Giles and Emmanuel Desurvire, "Propagation of Signal and Noise in Concatenated Erbium-Doped Fiber Optical Amplifiers," Journal of Lightwave Technology, vol. 9, No. 2, pp. 147-154, Feb. 1991.

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