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oe1(光电查) - 科学论文

2 条数据
?? 中文（中国） ▾

  • Wide-Span Multi-Wavelength High-Power Diode-Laser Pumping of Fiber Raman Laser

    摘要： A multimode silica-core ?ber Raman laser was pumped directly by ?ve wavelength-combined multimode diode lasers. The pump wavelengths were spread over a bandwidth of ～700 cm?1, namely, at 976, 969, 950, 940, and 915 nm. This is larger than the Raman peak shift of 490 cm?1 . The output power reached 31.5 W with an overall slope ef?ciency of 42% at the wavelength of 1018 nm when pumped with the maximum launched power of 175 W. According to simulations, the ?ber was under-length and the output power could double in a longer ?ber. Our results suggest that pumping with spectrally combined diode lasers is a promising approach to high-power ?ber Raman lasers, even when the pump wavelengths are not optimized.

    关键词： nonlinear optics,Raman lasers,Optical ?ber lasers

    更新于2025-09-16 10:30:52

  • Generation of high-energy and low-repetition rate hybrid pulses from a passively mode-locked Tm-Ho co-doped laser

    摘要： This study presents a passively mode-locked Tm-Ho co-doped ?ber laser at around 1840 nm with a low-repetition rate and high pulse energy. The laser delivers pulses at 93 kHz and produces a pulse energy of 18.5 nJ at 0.55 W pump power when the cavity length is 2.21 km. When the pump power is increased, high order of repetition rate outputs are observed. By a comparison of the spectra at various pump power levels indicates that the laser can be operated at hybrid multi-wavelength soliton mode-locking, depending on the pumping intensity. With the increase in pump power, single-wavelength soliton mode-locking and simultaneous of single- and dual-wavelength soliton mode locking are also observed. Besides, the system produces a laser at 1417 nm, which is induced by two-step absorption and the consequent stimulated emission. The low–repetition rate and high–pulse energy ?ber laser at around 1840 nm has potential applications in sensing, processing, and surgery research.

    关键词： Optical ?ber lasers,Mode locked lasers,Ultrafast optics

    更新于2025-09-12 10:27:22