Dr. Michael P. Eldred Profile

Dr. Michael P. Eldred

at Subaru Telescope NAOJ

SPIE Involvement:

Author

Publications (17)

Proceedings Article | 20 July 2010 Paper

Paper

Software control and characterization aspects for image derotator of the AO188 system at Subaru

Taras Golota, Shin Oya, Sebastian Egner, Makoto Watanabe, Michael Eldred, Yosuke Minowa, Hideki Takami, David Cook, Yutaka Hayano, Yoshihiko Saito, Masayuki Hattori, Vincent Garrel, Meguru Ito

Proceedings Volume 7735, 77353W (2010) https://doi.org/10.1117/12.857964

KEYWORDS: Telescopes, Control systems, Electroluminescence, Interfaces, Human-machine interfaces, Motion measurement, Distance measurement, Motion controllers, Adaptive optics, Mechanical engineering

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Proceedings Article | 15 July 2008 Paper

Paper

Implementation of 188-element curvature-based wavefront sensor and calibration source unit for the Subaru LGSAO system

Makoto Watanabe, Shin Oya, Yutaka Hayano, Hideki Takami, Masayuki Hattori, Yosuke Minowa, Yoshihiko Saito, Meguru Ito, Naoshi Murakami, Masanori Iye, Olivier Guyon, Stephen Colley, Michael Eldred, Taras Golota, Matthew Dinkins

Proceedings Volume 7015, 701564 (2008) https://doi.org/10.1117/12.789882

KEYWORDS: Adaptive optics, Calibration, Wavefront sensors, Mirrors, Avalanche photodetectors, Stars, Laser guide stars, Cameras, Telescopes, Optical fibers

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Proceedings Article | 15 July 2008 Paper

Paper

Development of a dichroic beam splitter for Subaru AO188

Yosuke Minowa, Hideki Takami, Makoto Watanabe, Yutaka Hayano, Masaaki Miyake, Masanori Iye, Shin Oya, Masayuki Hattori, Naoshi Murakami, Olivier Guyon, Yoshihiko Saito, Meguru Itoh, Stephen Colley, Matthew Dinkins, Michael Eldred, Taras Golota

Proceedings Volume 7015, 701561 (2008) https://doi.org/10.1117/12.788597

KEYWORDS: Beam splitters, Transmittance, Optical coatings, Thin film coatings, Humidity, Near infrared, Telescopes, Adaptive optics, Thorium, Absorption

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Proceedings Article | 14 July 2008 Paper

Paper

Characterization of vibrating shape of a bimorph deformable mirror

Shin Oya, Yosuke Minowa, Masayuki Hattori, Makoto Watanabe, Yutaka Hayano, Megru Itoh, Yoshihiko Saito, Hideki Takami, Masanori Iye, Olivier Guyon, Stephen Colley, Matthew Dinkins, Michael Eldred, Taras Golota

Proceedings Volume 7015, 70153R (2008) https://doi.org/10.1117/12.789600

KEYWORDS: Deformable mirrors, Adaptive optics, Sensors, Spectrum analysis, Mirrors, Finite element methods, Telescopes, Control systems, Shape analysis, Optical amplifiers

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Proceedings Article | 10 July 2008 Paper

Paper

Current status of the laser guide star adaptive optic system for Subaru Telescope

Yutaka Hayano, Hideki Takami, Olivier Guyon, Shin Oya, Masayuki Hattori, Yoshihiko Saito, Makoto Watanabe, Naoshi Murakami, Yosuke Minowa, Meguru Ito, Stephen Colley, Michael Eldred, Taras Golota, Matthew Dinkins, Nobunari Kashikawa, Masanori Iye

Proceedings Volume 7015, 701510 (2008) https://doi.org/10.1117/12.789992

KEYWORDS: Adaptive optics, Telescopes, Stars, Laser guide stars, K band, Gold vapor lasers, Optical fibers, Waveguides, Sodium, Point spread functions

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Proceedings Article | 28 June 2006 Paper

Paper

The laser guide star facility for Subaru Telescope

Yutaka Hayano, Yoshihiko Saito, Meguru Ito, Norihito Saito, Mayumi Kato, Kazuyuki Akagawa, Akira Takazawa, Stephen Colley, Matthew Dinkins, Michael Eldred, Taras Golota, Olivier Guyon, Masayuki Hattori, Shin Oya, Makoto Watanabe, Hideki Takami, Satoshi Wada, Masanori Iye

Proceedings Volume 6272, 627247 (2006) https://doi.org/10.1117/12.672583

KEYWORDS: Telescopes, Laser guide stars, Adaptive optics, Fiber lasers, Space telescopes, Laser systems engineering, Relays, Astronomy, Photonic crystal fibers, Diagnostics

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Proceedings Article | 28 June 2006 Paper

Paper

589 nm sum-frequency generation laser for the LGS/AO of Subaru Telescope

Yoshihiko Saito, Yutaka Hayano, Norihito Saito, Kazuyuki Akagawa, Akira Takazawa, Mayumi Kato, Meguru Ito, Stephen Colley, Matthew Dinkins, Michael Eldred, Taras Golota, Olivier Guyon, Masayuki Hattori, Shin Oya, Makoto Watanabe, Hideki Takami, Masanori Iye, Satoshi Wada

Proceedings Volume 6272, 627246 (2006) https://doi.org/10.1117/12.671964

KEYWORDS: Mode locking, Nd:YAG lasers, Laser guide stars, Laser development, Nonlinear crystals, Fiber lasers, Laser systems engineering, Telescopes, Oscillators, Sodium

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Proceedings Article | 28 June 2006 Paper

Paper

Transmission characteristics of high-power 589-nm laser beam in photonic crystal fiber

Meguru Ito, Yutaka Hayano, Norihito Saito, Kazuyuki Akagawa, Mayumi Kato, Yoshihiko Saito, Akira Takazawa, Hideki Takami, Masanori Iye, Satoshi Wada, Stephen Colley, Matthew Dinkins, Michael Eldred, Taras Golota, Olivier Guyon, Masayuki Hattori, Shin Oya, Makoto Watanabe

Proceedings Volume 6272, 627245 (2006) https://doi.org/10.1117/12.671972

KEYWORDS: Polarization, Laser scattering, Scattering, Optical fibers, Raman scattering, Telescopes, Relays, Sodium, Fiber lasers, Light scattering

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We are developing Laser Guide Star Adaptive Optics (LGSAO) system for Subaru Telescope at Hawaii, Mauna Kea. We achieved an all-solid-state 589.159 nm laser in sum-frequency generation. Output power at 589.159 nm reached 4W in quasi-continuous-wave operation. To relay the laser beam from laser location to laser launching telescope, we used an optical fiber because the optical fiber relay is more flexible and easier than mirror train. However, nonlinear scattering effect, especially stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS), will happen when the inputted laser power increases, i.e., intensity at the fiber core exceed each threshold. In order to raise the threshold levels of each nonlinear scattering, we adopt photonic crystal fiber (PCF). Because the PCF can be made larger core than usual step index fiber (SIF), one can reduce the intensity in the core. We inputted the high power laser into the PCF whose mode field diameter (MFD) is 14 μm and the SIF whose MFD is 5 μm, and measured the transmission characteristics of them. In the case of the SIF, the SRS was happen when we inputted 2 W. On the other hand, the SRS and the SBS were not induced in the PCF even for an input power of 4 W. We also investigated polarization of the laser beam transmitting through the PCF. Because of the fact that the backscattering efficiency of exciting the sodium layer with a narrowband laser is dependent on the polarization state of the incident beam, we tried to control the polarization of the laser beam transmitted the PCF. We constructed the system which can control the polarization of input laser and measure the output polarization. The PCF showed to be able to assume as a double refraction optical device, and we found that the output polarization is controllable by injecting beam with appropriate polarization through the PCF. However, the Laser Guide Star made by the beam passed through the PCF had same brightness as the state of the polarization.

Proceedings Article | 28 June 2006 Paper

Paper

Performance of the deformable mirror for Subaru LGSAO

Shin Oya, Aurelien Bouvier, Olivier Guyon, Makoto Watanabe, Yutaka Hayano, Hideki Takami, Masanori Iye, Masayuki Hattori, Yoshihiko Saito, Meguru Itoh, Stephen Colley, Matthew Dinkins, Michael Eldred, Taras Golota

Proceedings Volume 6272, 62724S (2006) https://doi.org/10.1117/12.670773

KEYWORDS: Deformable mirrors, Finite element methods, Electrodes, Adaptive optics, Glasses, Ferroelectric materials, Data modeling, Telescopes, Mirrors, Laser optics

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Proceedings Article | 27 June 2006 Paper

Paper

Status of Subaru laser guide star AO system

Hideki Takami, Stephen Colley, Matt Dinkins, Michael Eldred, Olivier Guyon, Taras Golota, Masayuki Hattori, Yutaka Hayano, Meguru Ito, Masanori Iye, Shin Oya, Yoshihiko Saito, Makoto Watanabe

Proceedings Volume 6272, 62720C (2006) https://doi.org/10.1117/12.670568

KEYWORDS: Adaptive optics, Laser guide stars, Telescopes, Mirrors, Wavefront sensors, Fiber lasers, Sensors, Avalanche photodetectors, Stars, Laser systems engineering

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Proceedings Article | 27 June 2006 Paper

Paper

Implementation of modal optimization system of Subaru-188 adaptive optics

Masayuki Hattori, Taras Golota, Guyon Olivier, Matthew Dinkins, Shin Oya, Stephen Colley, Michael Eldred, Makoto Watanabe, Meguru Itoh, Yoshihiko Saito, Yutaka Hayano, Hideki Takami, Masanori Iye

Proceedings Volume 6272, 62725G (2006) https://doi.org/10.1117/12.671027

KEYWORDS: Adaptive optics, Wavefronts, Servomechanisms, Optimization (mathematics), Control systems, Telescopes, Mirrors, Error analysis, Stars, Wavefront sensors

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Proceedings Article | 23 December 2004 Paper

Paper

Cassegrain and Nasmyth adaptive optics systems of 8.2-m Subaru telescope

Masanori Iye, Hideki Takami, Naruhisa Takato, Shin Oya, Yutaka Hayano, Olivier Guyon, Stephen Colley, Masayuki Hattori, M. Watanabe, Michael Eldred, Yoshihiko Saito, N. Saito, Kazuyuki Akagawa, Satoshi Wada

Proceedings Volume 5639, (2004) https://doi.org/10.1117/12.581238

KEYWORDS: Adaptive optics, Telescopes, Stars, Mirrors, Wavefront sensors, K band, Laser systems engineering, Wavefronts, Deformable mirrors, Control systems

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Proceedings Article | 25 October 2004 Paper

Paper

Subaru Telescope LGSAO: overview of expected performance

Olivier Guyon, Nobuo Arimoto, Celia Blain, Stephen Colley, Michael Eldred, Miwa Goto, Masayuki Hattori, Yutaka Hayano, Masanori Iye, Yukiko Kamata, Thomas Kane, Naoto Kobayashi, Makoto Watanabe, Yosuke Minowa, Shin Oya, Yoshihiko Saito, Hideki Takami, Naruhisa Takato

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.551942

KEYWORDS: Adaptive optics, Stars, Electrodes, Telescopes, Laser guide stars, Wavefronts, Wavefront sensors, Actuators, Wave propagation, Sensors

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Proceedings Article | 25 October 2004 Paper

Paper

Design of the Subaru laser guide star adaptive optics module

Makoto Watanabe, Hideki Takami, Naruhisa Takato, Stephen Colley, Michael Eldred, Thomas Kane, Olivier Guyon, Masayuki Hattori, Miwa Goto, Masanori Iye, Yutaka Hayano, Yukiko Kamata, Nobuo Arimoto, Naoto Kobayashi, Yosuke Minowa

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.551032

KEYWORDS: Mirrors, Adaptive optics, Telescopes, Sensors, Wavefront sensors, Avalanche photodetectors, Stars, Wavefronts, Laser guide stars, Infrared telescopes

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Proceedings Article | 25 October 2004 Paper

Paper

Laser guide star AO project at the Subaru Telescope

Hideki Takami, Makoto Watanabe, Naruhisa Takato, Stephen Colley, Michael Eldred, Thomas Kane, Olivier Guyon, Masayuki Hattori, Miwa Goto, Masanori Iye, Yutaka Hayano, Yukiko Kamata, Nobou Arimoto, Naoto Kobayashi, Yosuke Minowa

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.550839

KEYWORDS: Adaptive optics, Laser guide stars, Mirrors, Wavefront sensors, Telescopes, Sensors, Stars, Deformable mirrors, Avalanche photodetectors, Control systems

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Proceedings Article | 25 October 2004 Paper

Paper

Deformable mirror design of Subaru LGSAO system

Shin Oya, Olivier Guyon, Makoto Watanabe, Yutaka Hayano, Hideki Takami, Masanori Iye, Nobuo Arimoto, Stephen Colley, Michael Eldred, Thomas Kane, Masayuki Hattori, Yoshihiko Saito, Yukiko Kamata, Naoto Kobayashi, Yosuke Minowa, Miwa Goto, Naruhisa Takato

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.551907

KEYWORDS: Deformable mirrors, Adaptive optics, Laser optics, Ferroelectric materials, Finite element methods

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Proceedings Article | 25 October 2004 Paper

Paper

Design of laser system for Subaru LGS AO

Yutaka Hayano, Yoshihiko Saito, Norihito Saito, Kazuyuki Akagawa, Yukiko Kamata, Tomio Kanzawa, Tomio Kurakami, Naruhisa Takato, Stephen Colley, Michael Eldred, Thomas Kane, Olivier Guyon, Shin Oya, Makoto Watanabe, Masayuki Hattori, Taras Golota, Matthew Dinkins, Naoto Kobayashi, Yosuke Minowa, Miwa Goto, Nobuo Arimoto, Satoshi Wada, Hideki Takami, Masanori Iye

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.551015

KEYWORDS: Fiber lasers, Telescopes, Laser systems engineering, Laser guide stars, Adaptive optics, Optics manufacturing, Relays, Laser development, Laser optics, Mode locking

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Showing 5 of 17 publications

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