Miniature pulsed Ti:sapphire laser system

Zayhowski, J. J.; Wilson, A.L.

doi:10.1109/cleo.2002.1034162

Cited by 2 publications

(5 citation statements)

References 2 publications

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“…The amplifier pump diodes are operated near their maximum rated power, at 23 W, to provide the highest gain in the amplifier. Increasing the pump power beyond this point no longer increases the output power of the amplifier [1]. The optical train used to pump the amplifier is similar to that used to pump the microchip laser.…”

Section: Double-pass Amplifiermentioning

confidence: 98%

“…The actual magnification is fixed by adjusting the position of the lens to optimize the performance of the microchip laser. The microchip laser is a 6.5-mm-long diffusion-bonded composite of four crystals: a 1-mm-long passive Cr 3+ :YAG input endcap, a 3-mm-long Nd 3+ :Cr 3+ :YAG gain section, a 1.5-mm-long Cr 4+ :YAG saturable absorber, and a 1-mm-long passive Cr 3+ :YAG output endcap [1]. The Nd 3+ :Cr 3+ :YAG is doped at 1.4 wt% Nd; the Cr 4+ :YAG has an unsaturated absorption coefficient of 6 cm -1 at 1064 nm.…”

Section: Passively Q-switched Microchip Lasermentioning

confidence: 99%

“…The first stage of the laser system is a passively Q-switched Nd:YAG microchip laser [1][2][3][4][5]. The microchip laser is pulse pumped with a fiber-coupled diode-laser array.…”

Section: Passively Q-switched Microchip Lasermentioning

confidence: 99%

“…The entire 355-nm laser system was built using techniques and material systems that have been tested over a temperature range of -40 to 71°C, under shocks in excess of 20 G, and with the vibrations encountered in demanding flight scenarios [1]. Fig.…”

Section: -Nm Laser Systemmentioning

confidence: 99%

“…It is pumped with two fiber-coupled diode-laser arrays and occupies a volume of <0.5 liters. This system uses many of the components and techniques used in the miniature Ti:Sapphire laser system recently reported [1]. In this paper, we walk the reader through the 355-nm laser system and summarize its performance.…”

Section: Introductionmentioning

confidence: 99%

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Miniature, High-Power 355-nm Laser System

Zayhowski

Wilson

2003

Advanced Solid-State Photonics

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Section: Double-pass Amplifiermentioning

confidence: 98%

Section: Passively Q-switched Microchip Lasermentioning

confidence: 99%

“…The first stage of the laser system is a passively Q-switched Nd:YAG microchip laser [1][2][3][4][5]. The microchip laser is pulse pumped with a fiber-coupled diode-laser array.…”

Section: Passively Q-switched Microchip Lasermentioning

confidence: 99%

Section: -Nm Laser Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Miniature, High-Power 355-nm Laser System

Zayhowski

Wilson

2003

Advanced Solid-State Photonics

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An experimental setup for creating and imaging 4He2* excimer cluster tracers in superfluid helium-4 via neutron-3He absorption reaction

Sonnenschein

Tsuji

Kokuryu

et al. 2020

Review of Scientific Instruments

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For the purpose of future visualization of the flow field in superfluid helium-4, clusters of the triplet state excimer 4He2* are generated along the micro-scale recoil tracks of the neutron-absorption reaction n + 3He → 3T + p. This reaction is induced by neutron irradiation of the 3He fraction contained in natural isotopic abundance liquid helium with neutron beams either from the Japan Proton Accelerator Research Complex, Materials and Life Science Experimental Facility (JPARC)/Materials and Life Science Experimental Facility or from the Kyoto University Institute for Integrated Radiation and Nuclear Science. These 4He2* clusters are expected to be ideal tracers of the normal-fluid component in superfluid helium with several advantageous properties. Evidence of the excimer generation is inferred by detection of laser induced fluorescence emitted from the 4He2* clusters excited by a purpose-built short pulse gain-switched titanium:sapphire (Ti:sa) laser operating at a wavelength of 905 nm. The setup and performance characteristics of the laser system including the Ti:sa and two continuous wave re-pumping lasers are described. Detection at the fluorescence wavelength of 640 nm is performed by using optical bandpass filtered photomultiplier tubes (PMT). Electrical noise in the PMT acquisition traces could successfully be suppressed by post-processing with a simple algorithm. Despite other laser-related backgrounds, the excimer was clearly identified by its fluorescence decay characteristics. Production of the excimer was found to be proportional to the neutron flux, adjusted via insertion of different collimators into the neutron beam. These observations suggest that the apparatus we constructed does function in the expected manner and, therefore, has the potential for groundbreaking turbulence research with superfluid helium.

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Miniature pulsed Ti:sapphire laser system

Cited by 2 publications

References 2 publications

Miniature, High-Power 355-nm Laser System

Miniature, High-Power 355-nm Laser System

An experimental setup for creating and imaging 4He2* excimer cluster tracers in superfluid helium-4 via neutron-3He absorption reaction

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