Generating Picosecond Pulses With the Largest Number of Lasing Wavelengths by an All-Fiber Optical Parametric Oscillator

Abstract

An all-fiber parametric oscillator which is pumped by a mode-locked Er-doped picosecond fiber laser is proposed for the generation of multi-wavelength picosecond lasing pulses. The length of a fiber-coupled optical delay line is adjusted so that the first signal wavelength is tuned closer to the pump wavelength to facilitate the generation of more lasing wavelengths. 10 orders of cascaded four-wave-mixing processes are achieved and picosecond pulses at 17 lasing wavelengths from 1264.7 nm to 1842.4 nm are demonstrated. To the best of our knowledge, this is the largest number of lasing wavelengths reported so far from a fiber optical parametric oscillator pumped with an ultrashort-pulse laser.

Photonic Topological Valley-Locked Waveguides

“…The proposed TVLW has found some unique applications, such as high-energy-capacity topological channel intersections, valley-locked energy concentrators, and topological cavities with tailorable mode confinement, which are enabled by the mode width DOF. Besides, in comparison to the previous domain wall structures, the TVLW is more flexible to interface with the existing photonic waveguides and devices. , Finally, it would be interesting to experimentally investigate the photonic TVLW at higher frequencies, such as terahertz, infrared, and optical frequencies, and study its practical use of topological lasing, field enhancement, on-chip communication, and high-capacity energy transport.…”

“…Besides, in comparison to the previous domain wall structures, the TVLW is more flexible to interface with the existing photonic waveguides and devices. 37,38 Finally, it would be interesting to experimentally investigate the photonic TVLW at higher frequencies, such as terahertz, infrared, and optical frequencies, and study its practical use of topological lasing, 39 field enhancement, on-chip communication, and high-capacity energy transport.…”

Widely Wavelength-Tunable High Power Single-Longitudinal-Mode Fiber Laser in Mid-Infrared Waveband

“…So far, a number of techniques have been developed to achieve SLM lasers in the MIR region. Compared with SLM lasers based on traditional optical parametric oscillators (OPO) [11][12][13][14][15] and semiconductor-based quantum cascade lasers (QCLs) [16,17], MIR SLM fiber lasers based on ZBLAN fibers have some inherent merits such as good beam quality, high-conversion efficiency, excellent heat dissipation, and compact packing. Recently, SLM MIR fiber lasers have been demonstrated by using fiber Bragg grating (FBG) directly inscribed in a ZBLAN fiber [18,19].…”