155-μm high-peak, high-average-power laser amplifier using an Er,Yb:glass planar waveguide for wind sensing coherent Doppler lidar

Sakimura, Takeshi; Hirosawa, Kenichi; Watanabe, Yojiro; Ando, Toshiyuki; Kameyama, Shumpei; Asaka, Kota; Tanaka, Hisamichi; Furuta, Masashi; Hagio, Masahiro; Hirano, Y.; Inokuchi, Hamaki; Yanagisawa, Takayuki

doi:10.1364/oe.27.024175

Cited by 43 publications

(14 citation statements)

References 53 publications

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“…Due to eye-safe property and low transmission loss in the atmosphere and optical fiber, high-power lasers operating at 1.5 µm have attracted intensive interest in recent years [1] . For many applications, such as coherent Doppler lidar [2,3] , gravitational-wave detection [4,5] and nonlinear frequency conversion [6][7][8] , high-power, single-frequency (SF) and linearly polarized lasers with diffraction limited output are urgently needed. The master oscillator power amplifier (MOPA) is the most effective method for power scaling.…”

Section: Introductionmentioning

confidence: 99%

High-power 1560 nm single-frequency erbium fiber amplifier core-pumped at 1480 nm

Cheng

Lin

Yang

et al. 2022

High Pow Laser Sci Eng

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High power continuous-wave single frequency Er-doped fiber amplifiers at 1560 nm by in-band and core pumping of a 1480 nm Raman fiber laser are investigated in detail.Both co-and counter-pumping configurations are studied experimentally. Up to 59.1 W output and 90% efficiency were obtained in fundamental mode and linear polarization in the co-pumped case, while less power and efficiency were achieved in the counter-pumped setup for additional loss. The amplifier performs indistinguishably in terms of laser linewidth and relative intensity noise in frequency range up to 10 MHz for both configurations. But the spectral pedestal is raised in co-pumping caused by cross-phase modulation between the pump and signal laser, which is observed and analyzed for the first time. Nevertheless, the spectral pedestal is 34.9 dB below the peak, which has negligible effect for most applications.

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Section: Introductionmentioning

confidence: 99%

High-power 1560 nm single-frequency erbium fiber amplifier core-pumped at 1480 nm

Cheng

Lin

Yang

et al. 2022

High Pow Laser Sci Eng

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“…Single-frequency, diffraction-limited, pulsed, eye-safe laser sources with millijoule pulse energy and microsecond pulse width are required in coherent wind LIDAR systems. 1 Recently, 0.65 mJ output from a fiber amplifier was further boosted to 45 mJ by an Er:Yb doped planar waveguide power amplifier at a low repetition rate of 150 Hz. 2 Polarization-maintaining (PM) fiber-amplifiers based on a master-oscillator-power-amplifier (MOPA) configuration are attractive candidates for such systems, provided their design overcomes the challenge of achieving together high beam quality and high pulse energy, while also minimizing the impact of stimulated Brillouin scattering (SBS).…”

Section: Introductionmentioning

confidence: 99%

Single-frequency erbium-doped fiber amplifier with high energy gain at low repetition rates

Sudarshanam,

Jin,

Nicholson

2024

Fiber Lasers XXI: Technology and Systems

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We report pulse energy of 1.6 mJ at 1 kHz repetition rate from a single-frequency fiber amplifier with high energy gain of 19 dB at 1560 nm, using a 2.4 m long, very-large mode area (VLMA) polarization-maintaining (PM) erbium-doped fiber with 50 µm core diameter and absorption of 50 dB/m, core-pumped with a CW, 1480 nm Raman fiber laser. The in-pulse power fraction was 85%. The FWHM of the output pulses was 1.48 s at 1 kHz repetition rate. At 150 Hz repetition rate, of interest in coherent wind LIDAR systems, we report 1 mJ, with energy gain of 17 dB, in-pulse power fraction of 72%, and FWHM of 1.24 s. Stimulated Brillouin scattering limited the maximum energy reported here. The output of the fiber amplifier was diffraction limited, with mean beam quality factor, M 2 , of 1.04. The polarization extinction ratio exceeded 20 dB.

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“…Most important of all, the 1.6‐μm laser can be used as a light source for LIDAR. Up to now, there are three common types of light sources for LIDAR, as 10.6 μm CO 2 gas laser, 10,11 1.06 μm Nd: YAG solid‐state laser, 12,13 1.5–1.6‐μm 14 and 2.1‐μm eye‐safe laser 15 . Among them, the 10.6 μm CO 2 laser has a large volume, high cost, and wide linewidth of the output pulse, which leads to low wind measurement accuracy and limits its application in practice.…”

Section: Introductionmentioning

confidence: 99%

Development of 1.6‐μm Er: YAG solid‐state laser for lidar

Ren

et al. 2023

Micro & Optical Tech Letters

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In view of the advantages of 1.6-μm laser, it has important applications in the fields of laser radar, industry, military, and optical communication. This paper mainly focuses on 1.6-μm Er: YAG solid-state-laser for Laser Radar. The references about pulsed 1.6-μm single-longitudinal-mode laser, continuous wave 1.6-μm Er: YAG single-longitudinal-mode seed laser, and pulsed 1.6-μm Er: YAG Q-switched amplifier are collected and analyzed. The development status is introduced, the main problems are identified, and the future development direction is clarified. Maybe, this can provide a reference for other scholars.

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155-μm high-peak, high-average-power laser amplifier using an Er,Yb:glass planar waveguide for wind sensing coherent Doppler lidar

Cited by 43 publications

References 53 publications

High-power 1560 nm single-frequency erbium fiber amplifier core-pumped at 1480 nm

High-power 1560 nm single-frequency erbium fiber amplifier core-pumped at 1480 nm

Single-frequency erbium-doped fiber amplifier with high energy gain at low repetition rates

Development of 1.6‐μm Er: YAG solid‐state laser for lidar

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