Modular, high energy, widely-tunable ultrafast fiber source
First Claim
1. A fiber based chirped pulse amplification system generating output pulses in the range of 1-1.15 μ
- m, comprising;
a seed source comprising a diode-pumped, passively modelocked fiber laser comprising a saturable absorber and generating pulses in the 1-1.15 μ
m wavelength region;
a pulse stretcher which receives said pulses from said seed source, stretches said pulses in time, and outputs said stretched optical pulses;
a Yb;
fiber amplifier which receives said stretched optical pulses and generates amplified and stretched optical pulses;
an optical modulator disposed between said passively modelocked fiber laser and said Yb;
fiber amplifier, said modulator being controllable to reduce the repetition rate of pulses injected into said Yb;
fiber amplifier, to increase the available pulse energy of pulses amplified with said Yb;
fiber amplifier, and to provide for selection of pulses for amplification with said Yb;
fiber amplifier; and
a pulse compressor which inputs said amplified and stretched pulses and temporally compresses the amplified and stretched pulses to approximately their bandwidth limit.
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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. System compactness is ensured by employing efficient fiber amplifiers, directly or indirectly pumped by diode lasers. Dispersive broadening is introduced by dispersive pulse stretching in the presence of self-phase modulation and gain, resulting in the formation of high-power parabolic pulses. In addition, dispersive broadening is also introduced by simple fiber delay lines or chirped fiber gratings. The phase of the pulses in the dispersive delay line is controlled to quartic order by the use of fibers with varying amounts of waveguide dispersion or by controlling the chirp of the fiber gratings. After amplification, the dispersively stretched pulses can be re-compressed to nearly their bandwidth limit by the implementation of another set of dispersive delay lines. A particularly compact implementation of the whole system uses fiber oscillators in conjunction with fiber amplifiers.
72 Citations
21 Claims
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1. A fiber based chirped pulse amplification system generating output pulses in the range of 1-1.15 μ
- m, comprising;
a seed source comprising a diode-pumped, passively modelocked fiber laser comprising a saturable absorber and generating pulses in the 1-1.15 μ
m wavelength region;a pulse stretcher which receives said pulses from said seed source, stretches said pulses in time, and outputs said stretched optical pulses; a Yb;
fiber amplifier which receives said stretched optical pulses and generates amplified and stretched optical pulses;an optical modulator disposed between said passively modelocked fiber laser and said Yb;
fiber amplifier, said modulator being controllable to reduce the repetition rate of pulses injected into said Yb;
fiber amplifier, to increase the available pulse energy of pulses amplified with said Yb;
fiber amplifier, and to provide for selection of pulses for amplification with said Yb;
fiber amplifier; anda pulse compressor which inputs said amplified and stretched pulses and temporally compresses the amplified and stretched pulses to approximately their bandwidth limit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
- m, comprising;
Specification