Pulsed laser sources
First Claim
1. A frequency comb source comprising:
- a mode-locked fiber oscillator comprising an optical fiber disposed in an optical cavity that supports a plurality of optical modes, said mode-locked fiber oscillator mode-locking said optical modes to produce optical pulses and frequency components having a repetition frequency, frep, and a carrier envelope offset frequency, fceo, wherein said optical cavity of said modelocked fiber laser is configured with sufficiently low cavity dispersion such that a carrier envelope offset frequency beat signal (fceo beat signal) having a frequency bandwidth smaller than approximately 200 kHz is obtainable from said frequency comb source; and
an optical pump configured to pump said mode-locked fiber oscillator.
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Abstract
Modelocked fiber laser resonators may be coupled with optical amplifiers. An isolator optionally may separate the resonator from the amplifier. A reflective optical element on one end of the resonator having a relatively low reflectivity may be employed to couple light from the resonator to the amplifier. Enhanced pulse-width control may be provided with concatenated sections of both polarization-maintaining and non-polarization-maintaining fibers. Apodized fiber Bragg gratings and integrated fiber polarizers may also be included in the laser cavity to assist in linearly polarizing the output of the cavity. Very short pulses with a large optical bandwidth may be obtained by matching the dispersion value of the grating to the inverse of the dispersion of the intra-cavity fiber. Frequency comb sources may be constructed from such modelocked fiber oscillators. Low dispersion and an in-line interferometer that provides feedback may assist in controlling the frequency components output from the comb source.
163 Citations
20 Claims
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1. A frequency comb source comprising:
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a mode-locked fiber oscillator comprising an optical fiber disposed in an optical cavity that supports a plurality of optical modes, said mode-locked fiber oscillator mode-locking said optical modes to produce optical pulses and frequency components having a repetition frequency, frep, and a carrier envelope offset frequency, fceo, wherein said optical cavity of said modelocked fiber laser is configured with sufficiently low cavity dispersion such that a carrier envelope offset frequency beat signal (fceo beat signal) having a frequency bandwidth smaller than approximately 200 kHz is obtainable from said frequency comb source; and an optical pump configured to pump said mode-locked fiber oscillator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification