Spatial and temporal filtering of a 10-W Nd:YAG laser with a Fabry–Perot ring-cavity premode cleaner

Willke, B.; Uehara, Noboru; Gustafson, E. K.; Byer, Robert L.; King, Peter; Seel, S.; Savage, R. L.

doi:10.1364/ol.23.001704

Cited by 129 publications

(73 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…An optical three-mirror ring resonator similar to the design described in [15] was used as a mode cleaner (MC) in order to suppress higher-order transverse modes of the beam and to stabilize the beam pointing. A mode matching of better than 99% to the subsequent ACC was only possible thanks to this MC.…”

Section: Methodsmentioning

confidence: 99%

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

2009

View full text Add to dashboard Cite

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.

show abstract

Section: Methodsmentioning

confidence: 99%

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

2009

View full text Add to dashboard Cite

show abstract

“…This quantity can therefore be determined by measuring the coupling efficiency of the laser beam to a resonator. 3,4 The fundamental power can also be determined by decomposing the beam into Hermite-Gaussian modes. The advantage of such a modal analysis is that significantly more information about the beam is gathered.…”

Section: Introductionmentioning

confidence: 99%

“…Similar experiments are already described in the literature. However, only the fundamental power was determined in a manual evaluation of the measurement data 3,4 or the data were used to optimize the alignment and the mode matching of the resonator. 12 The sensitivity of the Modescan was experimentally investigated.…”

Section: Introductionmentioning

confidence: 99%

Laser beam quality and pointing measurement with an optical resonator

Kwee

Seifert

Willke

et al. 2007

Review of Scientific Instruments

View full text Add to dashboard Cite

We present a compact diagnostic breadboard that is based on an optical ring resonator for measuring beam quality and pointing of single-frequency continuous wave lasers at a wavelength of 1064 nm. To determine the beam quality of the coherent test beam, this optical resonator is used to perform a mode decomposition into Hermite-Gaussian modes. For our laser system, a power fraction in the fundamental Gaussian mode of 97.2% ± 0.2% was measured. Residual misalignment and mis-mode-matching to the resonator as well as the astigmatism and/or ellipticity of the test beam have been determined. Numerical simulations showed that measurements of the M 2 factor and transversal intensity distribution are not suitable for determining this power fraction. To measure the beam pointing, the fundamental mode of the optical resonator was used as a stable reference. The pointing of the test beam was measured with the differential wave front sensing technique up to Fourier frequencies of 1 kHz with a sensitivity to relative pointing of ͉⑀͉ =1ϫ 10 −6 / ͱ Hz. Pointing measurements with an alternative method were performed and showed good agreement.

show abstract

“…One of the ways is feedback the sum or difference between the two mode signals of I Ќ and I ʈ to an electric fan that acts as a controller to maintain the cavity length. To obtain a good pointing stability as well as pure Gaussian profiles, because the beam pointing and geometry fluctuations also affects on the output power stability, spatial and temporal filters such as Febry-Pérot ring cavity with high finesse 14,15 and an optical fiber mode cleaner 13 have been invented.…”

Section: Introductionmentioning

confidence: 99%

Laser output power stabilization for direct laser writing system by using an acousto-optic modulator

Kim

Rhee

Song

et al. 2007

Review of Scientific Instruments

View full text Add to dashboard Cite

We present experimental results on the output power stabilization of an Ar+ laser for a direct laser writing system (LWS). Instability of the laser output power in the LWS cause resolution fluctuations of being fabricated diffractive optical elements or computer-generated holograms. For the purpose of reducing the power fluctuations, we have constituted a feedback loop with an acousto-optic modulator, a photodetector, and a servo controller. In this system, we have achieved the stability of ±0.20% for 12min and the relative intensity noise level of 2.1×10−7Hz−1∕2 at 100Hz. In addition, we applied our system to a 2mW internal mirror He–Ne laser. As a consequence, we achieved the output power stability of ±0.12% for 25min.

show abstract

Spatial and temporal filtering of a 10-W Nd:YAG laser with a Fabry–Perot ring-cavity premode cleaner

Cited by 129 publications

References 9 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

Laser beam quality and pointing measurement with an optical resonator

Laser output power stabilization for direct laser writing system by using an acousto-optic modulator

Contact Info

Product

Resources

About