Developments of laser technology in China are reviewed in present paper. The growth rate of laser technology in China after 2000 is more than 10%, because of government great support for their laser developers.

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China is playing an import role and nearly the largest market in laser industry. In China there are more than one thousand laser companies and four large laser industry clusters. National research institutes and universities provide laser technology and industry focuses mainly on the development of laser equipment and machine. The total revenue of laser material processing reached 40 billion Yuan (about 6.5 billion US Dollar) in 2013. This article gives a brief review of the current status and outlook of Chinese laser industry.

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The Taiwan laser industrial supply chain is still establishing. The Laser Valley Project now is the driving force of the industrial development. For helping the semiconductor and micro-electronics industries, the laser processing industry has been grown up in these 10 years. However, it needs more technology and collaboration to strengthen the industry. This paper shows that the development status of Taiwan laser industry. It is tailored to make better understanding of Taiwan laser industry and more collaboration between Taiwan and Japan.

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This report analyzes the industrial laser markets in Taiwan. The total market is analyzed by the following end-use applications: mobile phone proximity sensor (PS), gesture controller & moving sensor, communications, consumer electronics, industrial processing machine, night vision surveillance and medical. The focus will be on Vertical Cavity Surface Emitting Laser (VCSEL). VCSEL provides the high performances in different application field, including high speed communication (10 Gbps, 40 Gbps, 100 Gbps and more), low power consuming PS & gesture sensor, high output power for fiber laser and night vision surveillance. Base on the strong semiconductor industrial, Taiwan has the good chances in developing VCSEL.

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Since the laser was firstly demonstrated in 1960, numerous applications of lasers have been developed for the manufacturing, electronic, consumer and medical industries. This paper reviews the current laserrelated technology activities in Singapore, it includes the laser source development, industrial laser application in manufacturing and measurement as well as scientific research in different field done by different organizations and companies in Singapore.

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This paper reports a newly developed high-quality nonlinear optical crystal CsLiB6O10 (CLBO) that is suitable for use in high-power deep-ultraviolet light sources. Reducing light scattering defects inside the crystal effectively improves the ultraviolet-induced degradation resistance. 52-μJ 266-nm picosecond pulses at a 100-kHz repetition rate were generated in the CLBO using a narrow spectral bandwidth hybrid master oscillator power amplifier (MOPA) that was seeded by a gain-switched laser diode as a fundamental light source. The average power of 266 nm was 5.2 W, and the conversion efficiency from 1064 to 266 nm was 34%.

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In this paper, we report a laser cutting process in glass using a pulse CO2 laser. We achieved drilling micro-through-holes in glass using a transverse-flow pulse CO2 laser with short pulses and verified a drilling speed of 800 holes per second with a 40-μm diameter. The smallest through-hole drilled in the glass substrate was a diameter of 25 μm. By continuously connecting the drilled holes, the glass substrates can be cut into arbitrary forms. We believe that cutting glass with a pulsed CO2 Laser is an effective processing method.

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We developed a prototype of an oil identification sensor to realize food safety and measures of that purpose. We analyzed the absorption spectrum of six edible oils and one inedible oil and determined five infra-red wavelengths for identifying them. We used 1657, 1685, 1713, 1727, and 1750 nm and five laser diodes (LD) of each wavelength for our prototype sensor. The small, 36 (width) × 80 (length) × 46 mm (height) prototype sensor had a pair of a projector (five LDs) and a receiver (one photo-diode) to slot it into a factory sensor system. The identification time for one oil sample was 250 microseconds. Such capability is adequate to be adapted into a factory checking line. The oils were clearly distinguished at different positions in a two-dimension map with normalized absorbance ratio at 1727 nm to at 1713 nm vs. absorption difference at 1727 nm and at 1713 nm.

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We measured the gas temperature on a surface discharge ozonizer by a Michelson interferometer using a He-Ne laser. The ozonizer has a configuration of a thin dielectric material plate (Al2O3) that is put between a stripe-shaped high voltage electrode and a grounded electrode. In these experiments, oxygen gas with a flow rate of 1.5 l/min was used for ozone generation, and ozone concentrations of 28 and 33 g/m3 were obtained at discharge powers of 31 and 57 W. The gas temperature was about 50 ℃, 70 ℃ at 2.5 mm from the surface of the ozonizer elements. The estimated temperature agreed qualitatively with the results of thermal conduction analysis.

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We investigated the refractive index of shock-compressed magnesium oxide in the 100‒400 GPa pressure range. Shock Hugoniot and a refractive index were measured using a laser-shock compression technique. The refractive index of MgO decreases monotonically with pressure to ~220 GPa along the Hugoniot and increases above the pressure. This result indicates that magnesium oxide is optically transparent enough to be used as a shock window at such dynamic high pressures.

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