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A Synchronously Self-Q-Switched and Self-Mode-Locked Fiber Laser with a Compound Resonator
摘要： We demonstrate a synchronously self-Q-switched and self-mode-locked output pulse ?ber laser based on a linear compound resonator and an LD cladding-pumped Yb-doped double-clad ?ber. A maximum average output power of 332.1 mW is achieved. We observe that the maximum pulse envelope width is 8 μs, and the pulse energy is 3.83 μJ for the self-Q-switched pulse envelope. At the same time, the achieved maximum pulse width is 37.8 ns and pulse energy is 17.61 nJ for the self-mode-locked pulse. We observe the pulse splitting of the self-Q-switched envelope as well and achieve 14 subpulse packets for L1 = 180 mm. There are 75 self-mode-locked pulses in single packets.
关键词： cladding-pump laser,?ber laser,self-Q-switch,compound resonator,pulse splitting,self-mode-locking
更新于2025-09-23 15:21:01
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[Laser Institute of America ICALEO? 2016: 35th International Congress on Applications of Lasers & Electro-Optics - San Diego, California, USA (October 16–20, 2016)] International Congress on Applications of Lasers & Electro-Optics - High power UV laser processing of CFRP with various ns pulses
摘要： While achieving high cutting speed, minimizing thermal damage is one of the important issues in the laser processing of Carbon Fiber-Reinforced Plastic (CFRP). Among the various parameters in the laser processing, we focused on pulse waveforms to investigate Heat Affected Zone (HAZ) occurrence and cutting speed using a high power (up to 60 W) 355-nm UV Quasar? laser from Spectra-Physics. Pulse width was varied from 2 ns to 10 ns and pulse splitting and burst mode technology using TimeShift? capability of laser was tested to cut 250 μm thick CFRP sheets. It was found that shorter pulse widths and pulse splitting were both effective at reducing HAZ and increasing cutting speed for PAN-based CFRP.
关键词： burst mode,pulse width,UV laser,CFRP,HAZ,cutting speed,pulse splitting
更新于2025-09-11 14:15:04
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Splitting and Motions of Dissipative Soliton Resonance Pulses in Mode-Locked Fiber Lasers
摘要： We numerically investigated the splitting and motions of dissipative soliton resonance (DSR) pulses in an all-normal-dispersion Yb-doped ?ber laser mode-locked by a non-linear optical loop mirror. At certain values of the system parameters, the initial single Gaussian pulse can evolve into an unstable DSR pulse with several dark solitons inside. After collisions of dark solitons, a big intensity dip occurs at the center of the DSR pulse, leading to the splitting of the DSR pulse. After splitting, the peak-to-peak separation between two DSR pulses increases at ?rst and ?nally reaches a ?xed value of 193 ps, indicating a steady-state multipulse operation The relative motions of separated DSR pulse originate from the phase shift.
关键词： dissipative soliton resonance,pulse splitting,non-linear optics,?ber lasers,mode-locked lasers
更新于2025-09-11 14:15:04