Spectralus Corporation

Santa Clara, CA, United States

Spectralus Corporation

Santa Clara, CA, United States
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Kerobyan M.,Spectralus CJSC | Gyulasaryan A.,Spectralus CJSC | Soghomonyan S.,Spectralus CJSC | Gabrielyan G.,Spectralus CJSC | Essaian S.,Spectralus Corporation
Journal of Modern Optics | Year: 2013

A method for measuring parallelism of transparent optical components with small aperture size is described. It uses a Haidinger-type laser interferometer adapted for the measurement of optical components with millimeter and sub-millimeter aperture size. The method is based on the measurement of the optical thickness variation when the plate under test is translated across a focused laser beam. Measurement results for optical parts with 0.8 mm-10 mm aperture size are presented. © 2013 Taylor & Francis.


Essaian S.,Spectralus Corporation | Khaydarov J.,Spectralus Corporation | Slavov S.,Spectralus Corporation | Ter-Mikirtychev V.,Spectralus Corporation | And 3 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2012

We report on progress in development of a miniature, highly efficient, and versatile diode-pumped solid-state (DPSS) green laser source, based on a monolithic cavity microchip laser platform. The use of periodically poled MgO-doped Lithium Niobate (PPMgOLN) as the nonlinear frequency doubler together with gain material Nd 3+:YVO 4 allows obtaining a significant increase in the overall efficiency of the green microchip laser in comparison with other compact green laser source architectures with comparable output power. Originally, this laser source was designed to be part of the miniature and efficient RGB light source for microdisplay-based (LCOS, DLP or similar) mobile projector devices. Recently, we have extended range of operations for our original laser platform. In particular, we demonstrate the following: high peak power (>500mW), high average power (>200mW), broad temperature range of operation (-30°C - 60°C), and low noise CW operation (<0.5% RMS). © 2012 SPIE.


Khaydarov J.,Spectralus Corporation | Essaian S.,Spectralus Corporation | Slavov S.,Spectralus Corporation | Gabrielyan G.,Spectralus CJSC | And 2 more authors.
SID Conference Record of the International Display Research Conference | Year: 2011

We report on progress in development of the low-cost highly efficient miniature (0.23cm 3) green laser designed for battery powered high-brightness pico-projectors. High power of 360mW with overall wall-plug efficiency (WPE) higher than 14% is demonstrated. Operating in pulsed regime with duty cycle of 33% required for field sequential LCOS- or DLP-based projectors, laser average output is 120mW. Brightness of the pico-projector powered by this laser could be as high as 501m.


Khaydarov J.,Spectralus Corporation | Essaian S.,Spectralus Corporation | Nemet G.,Spectralus Corporation | Shchegrov A.,Spectralus Corporation | And 5 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2010

Recent developments in compact projectors sparked interest in light sources for these applications. While RGB lasers offer advantages, a viable green laser platform has been difficult to realize. In this work, we demonstrate a novel green laser source, based on a monolithic cavity microchip laser platform. The use of highly efficient, periodically poled MgOdoped Lithium Niobate (PPMgOLN) as the nonlinear frequency doubler allows obtaining a significant increase in the overall efficiency of the green microchip laser. Specifically, we demonstrate 50-150mW green output with wall-plug efficiency exceeding 10% in the temperature range over 40°C. We discuss a compact package for this laser source with volume less than 0.4cm3. © 2010 Copyright SPIE - The International Society for Optical Engineering.


Khaydarov J.,Spectralus Corporation | Essaian S.,Spectralus Corporation | Shchegrov A.,Spectralus Corporation | Slavov S.,Spectralus Corporation | And 3 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2011

We report on highly efficient diode-pumped solid-state (DPSS) green laser source based on a monolithic cavity microchip laser platform. The use of periodically poled MgO-doped Lithium Niobate (PPMgOLN) as the nonlinear frequency doubler together with gain material Nd3+:YVO4 allows obtaining a significant increase in the overall efficiency of green microchip laser in comparison with other compact green laser source architectures with comparable output power. We discuss our progress in miniaturization and efficient operation across a wide range of temperatures and application-specific modulation conditions. In particular, we demonstrate 50mW-120mW average green output power (30% duty cycle) with wall-plug efficiency over 13%. Efficient laser operation with duty cycle ranging from 10% to 60% in a wide range of repetition rates is also demonstrated. The laser is designed to be a part of the miniature and efficient RGB light source for microdisplay-based (LCOS, DLP or similar) mobile projector devices. While these projection architectures typically require modulation rates from 60Hz to about 2000Hz depending on design, we extended modulation speed up to 2MHz that can be of interest for other applications. A very efficient and small microchip as well as alignment-free design allow us to package this laser source into the very small volume of only 0.23cm3 (bounding box). We present results of performance tests for this packaged laser and demonstrate that such a miniature package can support laser operation with average power output of over 250mW. © 2011 SPIE.


Kerobyan M.,Spectralus CJSC | Kerobyan M.,Armenian National Academy of Sciences | Gyulasaryan A.,Spectralus CJSC | Khachikyan A.,Spectralus CJSC | And 3 more authors.
Optics Communications | Year: 2013

We present a method for the measurement of a residual reflection at the interface between two optically contacted components of microchip laser. The method is based on the analysis of the reflection of a thermally scanned three-mirror Fabry-Perot interferometer (FPI). The microchip laser under test is illuminated with focused beam of a He-Ne laser, and is operated as a scanning interferometer by variation of its temperature. Imperfect optical contact leads to small reflection at the interface, which causes an amplitude modulation of the temperature response of the FPI reflection. The modulation depth is directly related to the reflection of the interface. The reflection coefficient of the interface is found from the measured modulation depth. Measurement results for microchips with sub-millimeter aperture size are presented. Residual reflection of 0.1-0.2% is determined. © 2013 Elsevier B.V.


Essaian S.,Spectralus Corporation | Khaydarov J.,Spectralus Corporation | Slavov S.,Spectralus Corporation | Gabrielyan G.,Spectralus CJSC | And 2 more authors.
49th Annual SID Symposium, Seminar, and Exhibition 2011, Display Week 2011 | Year: 2011

We report on progress in development of the low-cost highly efficient miniature green laser source for consumer electronics applications such as handheld and pocket projectors. The source is based on the monolithic cavity microchip with highly efficient periodically poled MgO-doped Lithium Niobate as the frequency doubler. This design allows high power output while maintaining small package size. We demonstrate up to 250mW average power output with >13% overall efficiency from the new package with total volume of 0.23cm3. We also demonstrate modulation speed of 2MHz, which, to our knowledge, is the highest, reported for the green microchip laser.


Shchegrov A.,Spectralus Corporation | Khaydarov J.,Spectralus Corporation | Essaian S.,Spectralus Corporation | Nemet G.,Spectralus Corporation | And 4 more authors.
Journal of the Society for Information Display | Year: 2010

A novel green laser source, based on a monolithic cavity microchip laser platform, has been developed. The laser is designed to be a part of a miniature and efficient RGB light source for microdisplay-based mobile projector devices. The use of highly efficient, periodically poled MgOdoped lithium niobate as the non-linear frequency doubler allows for a significant increase in the overall efficiency of the green microchip laser. Specifically, a 50-150-mW green output with a wallplug efficiency exceeding 10% in the temperature range of greater than 40°C has been demonstrated. A compact package for this laser source with a volume less than 0.33 cm3 is discussed and results of performance tests are presented. © Copyright 2010 Society for Information Display.


Essaian S.,Spectralus Corporation | Khaydarov J.,Spectralus Corporation
Optical Review | Year: 2012

We report on progress in development of the low-cost, highly efficient miniature diode-pumped solid-state (DPSS) green laser sources for pico-projectors and other consumer electronics applications with wavelength 532 nm. As Spectralus laser has monolithic microchip structure there are other green lasers with various discrete designs. We are reviewing both approaches in this paper. © 2012 The Optical Society of Japan.


Patent
Spectralus Corporation | Date: 2014-05-12

A laser light source includes a thermoelectric cooling device, a composite green laser made up of an infrared wavelength pumped laser diode and a solid-state laser cavity designed for efficient nonlinear intra-cavity frequency conversion into desired wavelengths using periodically poled nonlinear crystals thermally coupled with the cooling device and a red wavelength laser diode thermally coupled with said cooling device. In this manner, the cooling device maintains a common temperature of the infrared pumped laser diode and the red laser diode over an ambient temperature range.

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