TEM_00 mode content of a two stage single-frequency Yb-doped PCF MOPA with 246 W of output power

Karow, Malte; Basu, Chandrajit; Kracht, Dietmar; Neumann, Jörg; Weßels, P.

doi:10.1364/oe.20.005319

Cited by 19 publications

(11 citation statements)

References 12 publications

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“…shows that the beam contains above 94% in the fundamental Gaussian mode, which is similar to other results that have been reported with this type of fiber [12]. (ii) The beam jitter is critical for a wide range of applications especially in GW detection.…”

Section: W Fiber Amplifier Output Characterizationsupporting

confidence: 89%

High-power all-fiber ultra-low noise laser

et al. 2018

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High-power ultra-low noise single-mode single-frequency lasers are in great demand for interferometric metrology. Robust, compact all-fiber lasers represent one of the most promising technologies to replace the current laser sources in use based on injection-locked ring resonators or multi-stage solid-state amplifiers. Here, a linearly-polarized high-power ultra-low noise allfiber laser is demonstrated at a power level of 100 W. Special care has been taken in the study of relative intensity noise (RIN) and its reduction. Using an optimized servo actuator to directly control the driving current of the pump laser diode (LD), we obtain a large feedback bandwidth of up to 1.3 MHz. The RIN reaches -160 dBc/Hz between 3 kHz and 20 kHz.

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Section: W Fiber Amplifier Output Characterizationsupporting

confidence: 89%

High-power all-fiber ultra-low noise laser

et al. 2018

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“…2, right), which has been confirmed by the analysis with and transmission through a non-confocal ring cavity and is, to the best of our knowledge, the highest TEM 00 power measured [3]. Using large core fibers (e.g.…”

Section: Amplifier Setup and Power Scalingsupporting

confidence: 69%

Single-Frequency Fiber Amplifiers for Gravitational Wave Detection

et al. 2013

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“…In recent years, several (monolithic) single-frequency fiber amplifiers have been developed that demonstrated the power scalability of such devices. In 2012, Karow et al [9] reported a free-space pumped photonic crystal fiber based amplifier with 203 W of output power in the TEM 00 -mode. Additionally, no noise increase in the MHz range was observed with the conclusion of a truly SBS-free amplifier.…”

Section: Introductionmentioning

confidence: 99%

High power, single-frequency, monolithic fiber amplifier for the next generation of gravitational wave detectors

et al. 2019

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Low noise, high power single-frequency lasers and amplifiers are key components of interferometric gravitational wave detectors. One way to increase the detector sensitivity is to increase the power injected into the interferometers. We developed a fiber amplifier engineering prototype with a pump power limited output power of 200 W at 1064 nm. No signs of stimulated Brillouin scattering are observed at 200 W. At the maximum output power the polarization extinction ratio is above 19 dB and the fractional power in the fundamental transverse mode (TEM 00) was measured to be 94.8 %. In addition, measurements of the frequency noise, relative power noise, and relative pointing noise were performed and demonstrate excellent low noise properties over the entire output power slope. In the context of single-frequency fiber amplifiers, the measured relative pointing noise below 100 Hz and the higher order mode content is, to the best of our knowledge, at 200 W the lowest ever measured. A long-term test of more than 695 h demonstrated stable operation without beam quality degradation. It is also the longest single-frequency fiber amplifier operation at 200 W ever reported.

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TEM_00 mode content of a two stage single-frequency Yb-doped PCF MOPA with 246 W of output power

Cited by 19 publications

References 12 publications

High-power all-fiber ultra-low noise laser

High-power all-fiber ultra-low noise laser

Single-Frequency Fiber Amplifiers for Gravitational Wave Detection

High power, single-frequency, monolithic fiber amplifier for the next generation of gravitational wave detectors

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