Modular, high energy, widely-tunable ultrafast fiber source
First Claim
1. A passively modelocked fiber laser, comprising:
- a laser cavity comprising at least one Yb or Nd doped gain fiber; and
a pump diode to pump said laser cavity,wherein said laser cavity is configured for operation in a positive dispersion regime without negative dispersion cavity components.
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Abstract
A modular, compact and widely tunable laser system for the efficient generation of high peak and high average power ultrashort pulses. Peak power handling capability of fiber amplifiers is expanded by using optimized pulse shapes, as well as dispersively broadened pulses. Dispersive pulse stretching in the presence of self-phase modulation and gain results in the formation of high-power parabolic pulses. To ensure a wide tunability of the whole system, Raman-shifting of the compact sources of ultrashort pulses in conjunction with frequency-conversion in nonlinear optical crystals can be implemented, or an Anti-Stokes fiber in conjunction with fiber amplifiers and Raman-shifters are used. Positive dispersion optical amplifiers are used to improve transmission characteristics. An optical communication system utilizes a Raman amplifier fiber pumped by a train of Raman-shifted, wavelength-tunable pump pulses, to thereby amplify an optical signal which counterpropagates within the Raman amplifier fiber with respect to the pump pulses.
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Citations
14 Claims
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1. A passively modelocked fiber laser, comprising:
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a laser cavity comprising at least one Yb or Nd doped gain fiber; and a pump diode to pump said laser cavity, wherein said laser cavity is configured for operation in a positive dispersion regime without negative dispersion cavity components. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification