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US 5,696,782 AGranted
High power fiber chirped pulse amplification systems based on cladding pumped rare-earth doped fibers
AssigneeImra America, Inc.
InventorsDonald J. Harter, Almantas Galvanauskas, Martin E. Fermann
Life of this patent
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Abstract
Cladding-pumped fibers are used for chirped pulse amplification of ultrashort optical pulses, increasing the average output power by one order of magnitude and substantially decreasing the cost of pump sources. Broad-area multimode diode pumped Er/Yb codoped fiber amplifiers and MOPA pumped high-power Er-doped fiber amplifiers are used to achieve chirped pulse amplification.
Claims26
A high power chirped pulse amplification system generating ultrashort pulses, comprising:
- means for generating chirped light pulses, each of said chirped light pulses having a defined time period,
- a power amplifier stage comprising a double-clad fiber and a light pump for receiving said chirped light pulses from said light source and amplifying said chirped light pulses by increasing the energy and average power of the chirped light pulses, to thereby output amplified chirped light pulses, and
- a compressor compressing said amplified chirped light pulses received from said power amplifier stage to thereby shorten said time period and output ultrashort amplified chirped pulses.
A compressor for compressing chirped laser pulse signals having a defined time period, comprising:
- a fiber grating receiving the chirped laser pulse signals and compressing said chirped laser pulse signals to shorten said time period to a duration below an onset of non-linear effects in said fiber grating;
- a diffraction grating receiving said chirped laser pulse signals compressed by said fiber grating and further compressing said chirped laser pulse signals to further shorten said time period.
Dependencies are inferred from the claim text.