A Narrow-Linewidth Linearly Polarized 1018-nm Fiber Source for Pumping Diamond Raman Laser

A 7.8-GHz linewidth ytterbium-doped fiber (YDF) laser with an output power of 75 W at 1,018 nm is demonstrated based on narrow-bandwidth fiber Bragg gratings. Effective suppression of spectral broadening and amplified spontaneous emission is achieved by optimizing the resonator structure and active fiber parameters. An 1,178-nm diamond Raman output pumped by this narrow-linewidth 1,018 nm source is addressed in this study, which shows a promising application of generating the sodium guide star laser at 589 nm. A single-longitudinal-mode Stokes with an output power of 0.6 W is obtained using this multimode 1,018 nm laser at the pump power of 13 W. The impact of pump spectral linewidth on the effective Raman gain coefficient is analyzed, and the laser threshold of the diamond Stokes resonator increases with the broadening of the pump linewidth.

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kW-level, narrow-linewidth linearly polarized fiber laser with excellent beam quality through compact one-stage amplification scheme

High Power Laser Science and Engineering ◽

10.1017/hpl.2017.31 ◽

2017 ◽

Vol 5 ◽

Cited By ~ 8

Author(s):

Man Jiang ◽

Pengfei Ma ◽

Long Huang ◽

Jiangming Xu ◽

Pu Zhou ◽

...

Keyword(s):

Fiber Laser ◽

Output Power ◽

Beam Quality ◽

Scale Up ◽

Single Mode ◽

Narrow Linewidth ◽

Seed Laser ◽

One Stage ◽

Linearly Polarized

In this manuscript, we demonstrate high-power, narrow-linewidth linearly polarized fiber laser with excellent beam quality through compact one-stage amplification scheme. By employing a single-mode–multimode–single-mode structure seed laser, a linearly polarized Yb-doped fiber laser with narrow linewidth and high output power is achieved. This laser, when used as a master oscillator, can be capable of suppressing the ASE in the process of power amplification. Thus, only one-stage amplification structure is used to scale up the laser power, and linearly polarized output with a polarization extinction ration of 14 dB, a narrow linewidth of 0.3 nm and an output power of 1018 W are achieved. Moreover, due to the good beam quality of seed laser and the well-designed amplifier stage, the beam quality of the output laser is near-diffraction-limited with $M_{x}^{2}\sim 1.18$ and $M_{y}^{2}\sim 1.24$ at the maximum power, and without mode instability occurring.

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Nd:YAG ring laser with 213 W linearly polarized fundamental mode output power

Optics Express ◽

10.1364/opex.13.007516 ◽

2005 ◽

Vol 13 (19) ◽

pp. 7516 ◽

Cited By ~ 24

Author(s):

Maik Frede ◽

Ralf Wilhelm ◽

Dietmar Kracht ◽

Carsten Fallnich

Keyword(s):

Output Power ◽

Fundamental Mode ◽

Ring Laser ◽

Linearly Polarized

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Longitudinal mode control of a narrow-linewidth fiber laser by use of the intrinsic birefringence of the fiber laser

Optics Letters ◽

10.1364/ol.21.001679 ◽

1996 ◽

Vol 21 (20) ◽

pp. 1679 ◽

Cited By ~ 5

Author(s):

R. J. Forster ◽

N. Langford

Keyword(s):

Fiber Laser ◽

Longitudinal Mode ◽

Narrow Linewidth ◽

Mode Control ◽

Intrinsic Birefringence

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All-fiber, narrow linewidth and linearly polarized fiber laser in a single-mode-multimode-single-mode cavity

Applied Optics ◽

10.1364/ao.55.006121 ◽

2016 ◽

Vol 55 (22) ◽

pp. 6121 ◽

Cited By ~ 6

Author(s):

Man Jiang ◽

Haiyang Xu ◽

Pu Zhou ◽

Guomin Zhao ◽

Xijia Gu

Keyword(s):

Fiber Laser ◽

Single Mode ◽

Narrow Linewidth ◽

Linearly Polarized ◽

Single Mode Cavity

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Investigation of the impact of SBS-parameters and loss modulation on the mode locking of an SBS-laser oscillator

Laser and Particle Beams ◽

10.1017/s0263034607070188 ◽

2007 ◽

Vol 25 (1) ◽

pp. 107-116 ◽

Cited By ~ 13

Author(s):

PHILIP KAPPE ◽

ALEXANDER STRÄßER ◽

MARTIN OSTERMEYER

Keyword(s):

Brillouin Scattering ◽

Longitudinal Mode ◽

Mode Locking ◽

Equation Model ◽

Optical Modulator ◽

Round Trip ◽

Laser Oscillator ◽

Parameter Variations ◽

Stimulated Brillouin ◽

The Impact

A Nd:YAG laser oscillator Q-switched and mode locked via a nonlinear mirror based on stimulated Brillouin scattering (SBS) and aided by an acousto optical modulator (AOM) has been realised. A rate equation model and a round trip model are used to describe the longitudinal mode dynamics. Parameter variations of the nonlinear SBS mirror and the loss modulating AOM in the resonator are investigated with regard to their effect on the pulse duration and spectra of the pulses.

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All-Solid-State Narrow Linewidth Sodium Guide Star Laser

Chinese Journal of Lasers ◽

10.3788/cjl20093607.1848 ◽

2009 ◽

Vol 36 (7) ◽

pp. 1848-1851

Author(s):

鲁燕华 Lu Yanhua ◽

刘东 Liu Dong ◽

张雷 Zhang Lei ◽

马毅 Ma Yi ◽

唐淳 Tang Chun ◽

...

Keyword(s):

Solid State ◽

Narrow Linewidth ◽

Guide Star

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Single-Longitudinal-Mode Narrow Linewidth Fiber Lasers Using High Roundness Microsphere as Mode Selector

Chinese Journal of Lasers ◽

10.3788/cjl201744.1001003 ◽

2017 ◽

Vol 44 (10) ◽

pp. 1001003

Author(s):

万洪丹 Wan Hongdan ◽

丁佐芹 Ding Zuoqin ◽

汪杰 Wang Jie ◽

刘琳倩 Liu Linqian ◽

张祖兴 Zhang Zuxing

Keyword(s):

Fiber Lasers ◽

Longitudinal Mode ◽

Single Longitudinal Mode ◽

Narrow Linewidth

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Single-longitudinal-mode fiber laser with an ultra-narrow linewidth and extremely high stability obtained by utilizing a triple-ring passive subring resonator

Optics & Laser Technology ◽

10.1016/j.optlastec.2020.106329 ◽

2020 ◽

Vol 130 ◽

pp. 106329

Author(s):

Zhengkang Wang ◽

Jianming Shang ◽

Kuanlin Mu ◽

Yaojun Qiao ◽

Song Yu

Keyword(s):

Fiber Laser ◽

High Stability ◽

Longitudinal Mode ◽

Single Longitudinal Mode ◽

Narrow Linewidth

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On the contamination of the global 21 cm signal from polarized foregrounds

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/stz2425 ◽

2019 ◽

Cited By ~ 12

Author(s):

Marta Spinelli ◽

Gianni Bernardi ◽

Mario G Santos

Keyword(s):

Frequency Band ◽

Low Frequency ◽

Complex Frequency ◽

Gaussian Profile ◽

Reconstructed Signal ◽

Linearly Polarized ◽

Exotic Physics ◽

Single Polarization ◽

The Impact ◽

The Universe

Abstract Global (i.e. sky-averaged) 21 cm signal experiments can measure the evolution of the universe from the Cosmic Dawn to the Epoch of Reionization. These measurements are challenged by the presence of bright foreground emission that can be separated from the cosmological signal if its spectrum is smooth. This assumption fails in the case of single polarization antennas as they measure linearly polarized foreground emission - which is inevitably Faraday rotated through the interstellar medium. We investigate the impact of Galactic polarized foregrounds on the extraction of the global 21 cm signal through realistic sky and dipole simulations both in a low frequency band from 50 to 100 MHz, where a 21 cm absorption profile is expected, and in a higher frequency band (100 − 200 MHz). We find that the presence of a polarized contaminant with complex frequency structure can bias the amplitude and the shape of the reconstructed signal parameters in both bands. We investigate if polarized foregrounds can explain the unexpected 21 cm Cosmic Dawn signal recently reported by the EDGES collaboration. We find that unaccounted polarized foreground contamination can produce an enhanced and distorted 21 cm absorption trough similar to the anomalous profile reported by Bowman et al. (2018), and whose amplitude is in mild tension with the assumed input Gaussian profile (at ∼1.5σ level). Moreover, we note that, under the hypothesis of contamination from polarized foreground, the amplitude of the reconstructed EDGES signal can be overestimated by around 30%, mitigating the requirement for an explanation based on exotic physics.

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