Generation of synchronized three-color ultrashort laser pulses at high repetition rate

Abstract

Robust synchronization was achieved in a hybrid configuration for three-color high-repetition-rate ultrashort modelocked lasers around 800, 1030, and 1560 nm due to fractional amplification and enhanced cross-phase modulation. This hybrid synchronization scheme permits the achievements of timing jitter of 550 as between 800-nm and 1030-nm pulses by fractional amplification, and 8.3 fs between the 1030-nm and 1560-nm pulses by cross-phase modulation. The low timing jitter between 800-nm and 1030-nm pulses was commensurate with the broad emission band of the Ti:Sapphire laser.Intensity, arb. units 0.5 1.0

Ultrashort pulse duration and broadband dual-comb laser system based on a free-running passively mode-locked Er-fiber oscillator

“…As the dual-comb supercontinuum source has a broad wavelength band, it may be used as the seed to generate dualcomb ultrashort pulses at 1.0 µm [25]. To this end, YDFAs are introduced to amplify the spectral component at 1.0 µm in the supercontinuum.…”

Efficient generation of mid-infrared photons at 3.16 μm by coincidence frequency downconversion

“…As a result, a 0.3 nm signal source at 1.04 µm was obtained with a pulse duration of 6 ps. The FBG transmission was then amplified by a ytterbium-doped fiber amplifier before being injected into a slave erbium-doped fiber laser (EDFL) to achieve synchronous mode-locking as shown in figure 2(a) by means of cross-phase modulation [21,22]. A fiber band-pass filter with a 3 nm bandwidth was placed in the slave laser cavity to control the spectrum of the EDFL.…”

Square Nanosecond Mode-Locked Laser Based on Nonlinear Amplifying Loop Mirror

“…Interestingly, long-duration-pulse such as square nanosecond mode-locking lasers are desired in developing all-optical square-wave clocks [2], precise phase-locked ns laser arrays [3], high-energy laser pulses for particle acceleration [4], laser synchronization with x-rays or electron beams from synchrotrons [5], [6], ultra-high precise temporal control of multi-color lasers [7], and optical parametric chirped pulse amplification of ultrashort pulses [8]. The observed square ns mode-locking could be well understood by nonlinear polarization rotation (NPR) that leading to peak-powerclamped nonlinear phase shifts for different polarizations in sufficiently long fiber cavities, which is demonstrated by various experiments on peak power clamping effects [9], ns harmonic mode-locking [10], ultrashort laser triggered ns mode-locking [11], high-power amplification of square ns pulses [12], and synchronized modulations [9].…”