10 W single-mode single frequency Tm-doped fiber amplifiers optimized for 1800-2020-nm band

Meleshkevich, M.; Drozhzhin, Anton; Platonov, N.S.; Gapontsev, D.V.; Starodubov, D.S.

doi:10.1117/12.594385

Cited by 11 publications

(2 citation statements)

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“…5 for a 3-mW seed at 1800 nm and output power of 700 mW. The TmDFA is pumped by an Er:fiber laser at 1567 nm [29], but a shelf of spontaneous emission noise is observed at all wavelengths down to approximately 1470 nm. Another popular pump scheme for Tm lasers is to pump at 790 nm; a subsequent cross-relaxation process enables the generation of two laser photons for each pump photon.…”

Section: Single-photon Performancementioning

confidence: 99%

Long-wavelength-pumped upconversion single-photon detector at 1550 nm: performance and noise analysis

et al. 2011

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We demonstrate upconversion-assisted single-photon detection for the 1.55-μm telecommunications band based on a periodically poled lithium niobate (PPLN) waveguide pumped by a monolithic PPLN optical parametric oscillator. We achieve an internal conversion efficiency of 86%, which results in an overall system detection efficiency of 37%, with excess noise as low as 10(3) counts s(-1). We measure the dark count rate versus the upconversion pump-signal frequency separation and find the results to be consistent with noise photon generation by spontaneous anti-Stokes Raman scattering. These results enable detailed design guidelines for the development of low-noise quantum frequency conversion systems, which will be an important component of fiber-optic quantum networks.

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Section: Single-photon Performancementioning

confidence: 99%

Long-wavelength-pumped upconversion single-photon detector at 1550 nm: performance and noise analysis

et al. 2011

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“…In recent years, 2 µm single frequency fiber lasers have undergone rapid development [11][12][13][14][15][16][17][18][19][20][21][22] since fiber lasers have outstanding advantages including high efficiency, considerable compactness, convenience for thermal management, high beam quality and excellent stability. To realize single frequency fiber laser near 2 µm, distributed Bragg reflector (DBR) [15] and distributed-feedback (DFB) [12,19] techniques have been employed, the output power is limited and should be further amplified for practical applications.…”

mentioning

confidence: 99%

51.5 W monolithic single frequency 1.97 m Tm-doped fiber amplifier

Wang¹,

Zhang²,

Wang³

et al. 2013

High Pow Laser Sci Eng

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We demonstrate a monolithic single frequency Tm-doped fiber amplifier with output power of 51.5 W. A single frequency fiber laser at 1.97 µm is amplified by a cascaded master oscillator power amplifier (MOPA) system with all-fiber configuration. The optical-to-optical conversion efficiency of the main fiber amplifier is 45%. No amplified spontaneous emission (ASE) or stimulated Brillouin scattering (SBS) effect is observed in the fiber amplifier. The output power could be further scaled by launching more pump power. Keywords:Single .frequency .lasers near .2 µm, which play a significant role in many applications such as coherent LIDAR, coherent beam combining, nonlinear frequency conversion, medicine, atmospheric sensing and spectroscopy, have attracted intense interest and have been widely investigated [1][2][3][4][5][6][7][8][9][10][11][12] . In recent years, 2 µm single frequency fiber lasers have undergone rapid development [11][12][13][14][15][16][17][18][19][20][21][22] since fiber lasers have outstanding advantages including high efficiency, considerable compactness, convenience for thermal management, high beam quality and excellent stability. To realize single frequency fiber laser near 2 µm, distributed Bragg reflector (DBR) [15] and distributed-feedback (DFB) [12,19] techniques have been employed, the output power is limited and should be further amplified for practical applications. At present, most of the reported high power single frequency fiber lasers near 2 µm are achieved based on bulk configuration [3,4] . Meanwhile, monolithic fiber lasers based on all-fiber configuration possess the advantages of being more stable and practical, so it is really attractive to investigate and develop single frequency fiber lasers near 2 µm employing monolithic fiber configuration [20] . An admirable previous work has been done by Gapontsev et al., who demonstrated a 20 W monolithic single frequency fiber amplifier at 1.93 µm in 2007 [18] .In this paper, we demonstrate a monolithic single frequency fiber amplifier at 1.97 µm based on master oscillator stimulated Brillouin scattering (SBS) effect observed in the amplifier, which means the output power can be improved further if the pump power is increased.In the MOPA system, the single frequency seed fiber laser based on ultrashort cavity [16] operates at 1.97 µm and has an output power of 35 mW, and the linewidth is less than 100 kHz. Figure 1 shows the two-stage Tm-doped fiber preamplifier. The first stage of the pre-amplifier consists of a 1550 nm pump laser, a 1550/2000 wavelength division multiplexer (WDM), an isolator (ISO) and a piece of 2.5 m long single cladding Tm-doped fiber (NA is 0.15) with core diameter of 9 µm and cladding diameter of 125 µm. The second stage of the pre-amplifier employs a (2 + 1) × 1 signal-pump combiner and two 793 nm laser diodes (LDs). The amplified 2 µm laser signal was injected into a piece of 8 m long double cladding Tm-doped fiber (DC-TDF) with core diameter of 10 µm and inner cladding diameter of 125 µm. The Tm-do...

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