Optical: systems and elements – Optical amplifier – Optical fiber
Patent
1996-01-19
1999-02-02
Hellner, Mark
Optical: systems and elements
Optical amplifier
Optical fiber
372 6, H01S 310
Patent
active
058673059
ABSTRACT:
Two approaches are provided for achieving an optical amplifier system capable of producing high peak power, high energy pulse outputs while suppressing scattering noise. The first approach relates to an optical amplifier system which has at least one laser diode pulsed or cw pumped double clad fiber amplifier utilized for receiving a high frequency modulated injected signal pulse of short duration from the laser diode, via the fiber core, for amplification by coupling pump light into the inner cladding of the fiber. The average signal power is sufficient to saturate the gain of the fiber so as to minimize significant onset and buildup of forward and backward scattering noise. The duty cycle of the injected signal source pulse is chosen to allow adequate gain recovery in the fiber amplifier between pulses. The second approach relates to a cascaded optical amplifier system having at least two optical amplifying stages with two pulsed pump sources providing and two amplifying media, the first of which receives the injection and at least one pump signal wherein the injection pulsed signal is amplified to a first power and energy level. The second amplifying medium, optically coupled to the first, amplifies the first level signal to a second level amplified, injection pulsed signal. The duty cycle of the injection pulsed optical signal is synchronized with the first and second pulsed pump signals with the first pulsed pump signal having a different duration in the duty cycle than the second pulsed pump signal.
REFERENCES:
patent: 4136929 (1979-01-01), Suzaki
patent: 5050949 (1991-09-01), DiGiovanni et al.
patent: 5128800 (1992-07-01), Zirngibl
patent: 5175643 (1992-12-01), Andrews
patent: 5185826 (1993-02-01), Delavaux
patent: 5218608 (1993-06-01), Aoki
patent: 5218665 (1993-06-01), Grasso et al.
patent: 5232404 (1993-08-01), Felstehausen
patent: 5276758 (1994-01-01), Hughes
patent: 5303314 (1994-04-01), Duling, III et al.
patent: 5331449 (1994-07-01), Huber et al.
patent: 5335236 (1994-08-01), Toeppen
patent: 5337175 (1994-08-01), Ohnsorge et al.
patent: 5339183 (1994-08-01), Suzuki
patent: 5392308 (1995-02-01), Welch et al.
patent: 5400350 (1995-03-01), Galvanauska
patent: 5696782 (1997-12-01), Harter et al.
Johan Milsson et al., entitled "Modeling and optimization of low repetition-ratehigh-energy pulse amplification in cw-pumped erbium-doped fiber amplifiers" Optics Letters, vol. 18, No. 2, Dec. 15, 1993, pp. 2099-2101.
K.Y. Ko et al., entitled "Transient analysis of erbium-doped fiber amplifiers" IEEE Photonics Technology Letters, vol. 6, No. 12, Dec., 1994, pp. 1436-1438.
J.D. Minelly et al., entitled "Femtosecond pulse amplification in cladding-pumped fibers", Optics Letters, vol. 20, No. 17, Sep. 1, 1995, pp. 1797-1799.
B. Desthieux, et al., entitled "111 KW (0.5 mJ) pulse amplification at 1.5 micron using a gated cascade of three erbium-doped fiber amplifiers", Applied Physics Letters, vol. 63, No. 5, Aug. 2, 1993, pp. 586-588.
John Sweetser et al. entitled "Efficient high repetition rate synchronous amplification of a psssively mode-locked femtosecond dye laser" Applied Optics, Aug. 20, 1993, vol. 32, No. 24, pp. 4471-44.
Lei et al. entitled "High-repetition tunable Picosecond Dye Laser Pumped by a copper bromide laser" IEEE Journal of Quantum Electronics, Feb. 27, 1991, No. 2, pp. 283-287.
Sanders Steven
Scifres Donals R.
Waarts Robert G.
Welch David F.
Carothers, Jr. W. Douglas
Hellner Mark
SDL Inc.
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