Modeling of efficient mode-matching and thermal-lensing effect on a laser-beam coupling into a mode-cleaner cavity

Uehara, Noboru; Gustafson, E. K.; Fejer, M. M.; Byer, Robert L.

doi:10.1117/12.273681

Cited by 27 publications

(16 citation statements)

References 6 publications

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“…Dependent on the input power of the ACC, the curvature of the resonator mirrors was slightly changed due to absorption of the Gaussian beam [17]. Thus, the round trip Gouy phase was changed and the resonance frequencies of the higher-order transverse modes were shifted in relation to the fundamental mode.…”

Section: A Higher-order Mode Scatteringmentioning

confidence: 97%

Laser power stabilization using optical ac coupling and its quantum and technical limits

2009

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We demonstrate an active power stabilization of a Nd:YAG laser employing the optical ac-coupling scheme and derive its fundamental quantum limit. This limit is 3 dB better than the one encountered in traditional power stabilization schemes. In our experiment, the optical ac coupling improved the shotnoise-limited sensitivity of the stabilization photodetector by a factor of 11.2. With an independent photodetector, we measured a relative power stability of 3:7 × 10 −9 Hz −1=2 at frequencies of around 200 kHz. A detailed investigation of the performance limit of our experiment revealed a novel noise source that disturbed the fundamental mode field in the optical resonator. This effect could be of relevance to many precision experiments using optical resonators.

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Section: A Higher-order Mode Scatteringmentioning

confidence: 97%

Laser power stabilization using optical ac coupling and its quantum and technical limits

2009

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“…There is interest in ring-cavity mode cleaners for high-power lasers for gravitational wave interferometers. 21 Gravitational wave interferometers themselves have been analyzed with a mode expansion model similar to the one treated here. 22 The aim of the present analysis is to calculate the power transmission of an ideal TEM 00 mode filter for different phase aberrations of a perturbed TEM 00 mode.…”

Section: Aberrated Tem 00 Beamsmentioning

confidence: 99%

Adaptive aberration control in laser amplifiers and laser resonators

Wittrock

Buske

Heuck

2003

Laser Resonators and Beam Control VI

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We present experimental and theoretical results on aberration control in solid state laser amplifiers and resonators. In lasers with diffraction-limited beam quality, aberrations cause diffraction losses that reduce the output power. In laser amplifiers, aberrations degrade the beam quality of the amplified beam. Adaptive optics can be used to correct for the aberrations and thus increase output power and beam quality. The required precision of the adaptive aberration correction can be estimated with a simple mode expansion model in which an aberrated TEM 00 mode is expanded into Hermite-Gaussian modes. Apart from these theoretical results we will present experimental results for a MOPA (MasterOscillator-Power-Amplifier) laser system consisting of a Nd:YVO 4 master oscillator and two Nd:YAG power amplifiers. A micromachined deformable mirror was used in a closed-loop system to correct for the thermo-optic aberrations of the amplifiers. A beam with a beam quality of M 2 = 2.5 at an output power of 80 W was obtained. The deformable mirror was controlled by a genetic algorithm.

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“…In the past several experiments were performed to measure the beam properties of NPROs or similar lasers, as for example in combination with a stabilization of the output power [7,18], the frequency [8,19], or the beam quality [18,20]. However to our knowledge neither the variation of laser properties over several different NPROs nor the long-term variations were analyzed in detail.…”

Section: Introductionmentioning

confidence: 99%

Automatic laser beam characterization of monolithic Nd:YAG nonplanar ring lasers

Kwee

Willke

2008

Appl. Opt.

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A detailed beam characterization of continuous-wave single-frequency Nd:YAG solid-state ring lasers at a wavelength of 1064 nm is presented. The power noise, frequency noise, beam pointing fluctuations, spatial beam quality, and other properties of eight lasers of the same model were measured with a compact diagnostic instrument based on an optical ring resonator. One of the eight lasers was automatically characterized over a period of 3.5 months to investigate the long-term behavior. The results show that these lasers are highly stable laser sources, that the variations between different samples are rather small, and that these lasers are ideally suited for high precision optical experiments.

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Modeling of efficient mode-matching and thermal-lensing effect on a laser-beam coupling into a mode-cleaner cavity

Cited by 27 publications

References 6 publications

Laser power stabilization using optical ac coupling and its quantum and technical limits

Laser power stabilization using optical ac coupling and its quantum and technical limits

Adaptive aberration control in laser amplifiers and laser resonators

Automatic laser beam characterization of monolithic Nd:YAG nonplanar ring lasers

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