Fundamental mode, single-frequency laser amplifier for gravitational wave detectors

Frede, M.; Schulz, B.; Wilhelm, René; Kwee, P.; Seifert, F.; Willke, B.; Kracht, Dietmar

doi:10.1364/oe.15.000459

Cited by 59 publications

(37 citation statements)

References 12 publications

(10 reference statements)

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“…The second stage (medium-power amplifier) is a single-pass amplifier [11] with an output power of 35 W. The seed laser beam from the NPRO stage passes through four Nd:YVO 4 crys- tals which are longitudinally pumped by fiber-coupled laser diodes at 808 nm. The third stage is an injection-locked ring oscillator [8] with an output power of about 220 W, called the high-power oscillator (HPO).…”

Section: Laser System and Stabilizationmentioning

confidence: 99%

Stabilized high-power laser system for the gravitational wave detector advanced LIGO

Kwee¹,

Bogan²,

Danzmann³

et al. 2012

Opt. Express

176

113

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An ultra-stable, high-power cw Nd:YAG laser system, developed for the ground-based gravitational wave detector Advanced LIGO (Laser Interferometer Gravitational-Wave Observatory), was comprehensively characterized. Laser power, frequency, beam pointing and beam quality were simultaneously stabilized using different active and passive schemes. The output beam, the performance of the stabilization, and the cross-coupling between different stabilization feedback control loops were characterized and found to fulfill most design requirements. The employed stabilization schemes and the achieved performance are of relevance to many high-precision optical experiments.

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Section: Laser System and Stabilizationmentioning

confidence: 99%

Stabilized high-power laser system for the gravitational wave detector advanced LIGO

Kwee¹,

Bogan²,

Danzmann³

et al. 2012

Opt. Express

176

113

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“…As sketched in the system schematic of the laser in Fig. 1, a 2 W non-planar ring oscillator (NPRO, manufactured by InnoLight) is amplified in a single pass through four longitudinally pumped Nd:YVO 4 crystals (details can be found in [4]). The single frequency beam from the amplifier is then fed into the main oscillator, which consists of four end-pumped Nd:YAG crystals arranged in a ring resonator.…”

Section: Laser Conceptmentioning

confidence: 99%

“…Currently, two 35 W amplifier systems, developed by Frede et al [4], are installed at the LIGO sites for the 4 km interferometer and have proven to be well suited as a light source for an interferometric gravitational wave detector. For the next major upgrade of the LIGO detectorsadvanced LIGO-an output power increase to a level of more than 165 W in a pure Gaussian beam is desired [5].…”

Section: Introductionmentioning

confidence: 99%

Injection-locked single-frequency laser with an output power of 220 W

et al. 2011

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A solid-state laser system for the next generation of gravitational wave detectors with an output power of 220 W at the wavelength of 1064 nm is presented. Singlefrequency operation of the laser was achieved by injectionlocking of a high-power ring oscillator to an amplified nonplanar ring oscillator (NPRO) following the Pound-DreverHall scheme. The high-power stage which features four longitudinally pumped Nd:YAG laser crystals as active media in a ring resonator configuration was designed for reliable long term operation. Using a non-confocal ring cavity to filter the output beam, a pure TEM 00 mode with 168 W output power was obtained.

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“…Figure 1 shows the optical layout of the 200 W laser system. A monolithic non-planar ring oscillator (NPRO) with 2 W output power [12] is amplified by a four-head Nd:YVO laser amplifier [13] power levels of up to 65 W were achieved with a similar amplifier unit when pumped with a 20 W seed laser. The 35 W amplifier output was measured to have a TEM 00 content of greater than 93% and was operated for several weeks without any significant power loss.…”

Section: Low Noise High Power Generationmentioning

confidence: 99%

Stabilized lasers for advanced gravitational wave detectors

Willke

2010

Laser & Photonics Reviews

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Second generation gravitational wave detectors require high power lasers with more than 100 W of output power and with very low temporal and spatial fluctuations. To achieve the demanding stability levels required, low noise techniques and adequate control actuators have to be part of the high power laser design. In addition feedback control and passive noise filtering is used to reduce the fluctuations in the so-called prestabilized laser system (PSL). In this paper, we discuss the design of a 200 W PSL which is under development for the Advanced LIGO gravitational wave detector and will present the first results. The PSL noise requirements for advanced gravitational wave detectors will be discussed in general and the stabilization scheme proposed for the Advanced LIGO PSL will be described.

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Fundamental mode, single-frequency laser amplifier for gravitational wave detectors

Cited by 59 publications

References 12 publications

Stabilized high-power laser system for the gravitational wave detector advanced LIGO

Stabilized high-power laser system for the gravitational wave detector advanced LIGO

Injection-locked single-frequency laser with an output power of 220 W

Stabilized lasers for advanced gravitational wave detectors

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