Imra America, Inc.

Gas Research Institute

Yuzuru Uehara

Donald J Harter

Xinhua Gu

Martin E Fermann

Yong Che

Zhendong Hu

Bing Liu

Michelle L Stock

Jorge W Jimenez

A chirped pulse amplifier (CPA) system having a mode-locked laser and a high-speed pulse selector, wherein the pulse selector modulates output pulses based upon an applied modulation voltage. A pulse selector may be an integrated electro-optic modulator, for example a LiNbOmodulator, or an electro-absorption modulator. Difficulties related to free-space alignment and operational stability of some prior designs are reduced or eliminated. Fiber coupling generally simplifies beam delivery and alignment. Some embodiments include an erbium fiber (or erbium-ytterbium) based CPA system operating at a wavelength of approximately 1550 nanometers. Similar performance can be obtained at other wavelengths, for example a 1.06 micrometer Yb-doped fiber system. Moreover, high amplification and peak intensity at the output may be achieved while avoiding non-linear effects in the pulse selector, thereby providing for high intensity picosecond or femtosecond operation.

High power fiber chirped pulse amplification system utilizing telecom-type components

A p-type semiconductor zinc oxide (ZnO) film and a process for preparing the film are disclosed. The film is co-doped with phosphorous (P) and lithium (Li). A pulsed laser deposition scheme is described for use in growing the film. Further described is a process of pulsed laser deposition using transparent substrates which includes a pulsed laser source, a substrate that is transparent at the wavelength of the pulsed laser, and a multi-target system. The optical path of the pulsed laser is arranged in such a way that the pulsed laser is incident from the back of the substrate, passes through the substrate, and then focuses on the target. By translating the substrate towards the target, this geometric arrangement enables deposition of small features utilizing the root of the ablation plume, which can exist in a one-dimensional transition stage along the target surface normal, before the angular width of the plume is broadened by three-dimensional adiabatic expansion. This can provide small deposition feature sizes, which can be similar in size to the laser focal spot, and provides a novel method for direct deposition of patterned materials.

P-type semiconductor zinc oxide films process for preparation thereof, and pulsed laser deposition method using transparent substrates

A chirped pulse amplifier (CPA) system having a mode-locked laser and a high-speed pulse selector, wherein the pulse selector modulates output pulses based upon an applied modulation voltage. A pulse selector may be an integrated electro-optic modulator, for example a LiNbOmodulator, or an electro-absorption modulator. Difficulties related to free-space alignment and operational stability of some prior designs are reduced or eliminated. Fiber coupling generally simplifies beam delivery and alignment. Some embodiments include an erbium fiber (or erbium-ytterbium) based CPA system operating at a wavelength of approximately 1550 nanometers. Similar performance can be obtained at other wavelengths, for example a 1.06 .micrometer Yb-doped fiber system. Moreover, high amplification and peak intensity at the output may be achieved while avoiding non-linear effects in the pulse selector, thereby providing for high intensity picosecond or femtosecond operation.

A chirped pulse amplifier (CPA) system having a mode-locked laser and a high-speed pulse selector, wherein the pulse selector modulates output pulses based upon an applied modulation voltage. A pulse selector may be an integrated electro-optic modulator, for example a LiNbOmodulator, or an electro-absorption modulator. Difficulties related to free-space alignment and operational stability of some prior designs are reduced or eliminated. Fiber coupling generally simplifies beam delivery and alignment. Some embodiments include an erbium fiber (or erbium-ytterbium) based CPA system operating at a wavelength of approximately 1550 nanometers. Similar performance can be obtained at other wavelengths, for example a 1.06 .micrometer Yb-doped fiber system. Moreever, high amplification and peak intensity at the output may be achieved while avoiding non-linear effects in the pulse selector, thereby providing for high intensity picosecond or femtosecond operation.

An erbium fiber (or erbium-ytterbium) based chirped pulse amplification system is illustrated. The use of fiber amplifiers operating in the telecommunications window enables the implementation of telecommunications components and telecommunications compatible assembly procedures with superior mechanical stability.

A compact fiber laser unit includes a laser source, a laser oscillator connected to the laser source for generating an optical and a laser amplifier connected to the laser oscillator for amplifying the optical pulse produced by the laser oscillator. The laser oscillator includes a first optical fiber that connects bulk components of the laser oscillator to the laser source and the laser amplifier includes a second optical fiber that connects bulk components of the laser amplifier to the laser source. The first and second fibers are wound around a common holder in the form of a fiber tray. The fiber tray is connected to a fiber bench and the bulk components of the laser oscillator and the laser amplifier are mounted on the fiber bench.

Compact fiber laser unit

An engine driven air conditioner for adjusting a temperature of an inner space of a room, includes a coolant circuit having a compressor, a condenser, an expansion device and an evaporator, an engine for driving the compressor, and a control device for controlling the coolant circuit and the engine in such a manner that the engine is driven at its minimum power or at a power other than the minimum power. During operation the engine is stopped if the temperature exceeds a first set value while the engine is being driven at the minimum power, the engine is stopped if the temperature exceeds a second set value which is less than the first set value while the engine is being driven after the minimum power operation, and the engine is driven at the minimum power when the engine is re-started after a temporary stop of the engine.

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Ann Arbor, MI, United States of America

Yuzuru Uehara