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Lasers ♦ news digest


speed optical modulation capability of more than 100 MHz and short pulse of less than 1 nsec operation. This was done with a simple direct current modulation scheme, which showed that it could be effective for time resolved spectroscopy and other fields. These unique characteristics of high-power, high- efficiency, and high-speed modulation with compact package are also expected to apply to future display applications like heads-up displays or ultra-compact mobile projectors, which are attracting much attention and growing in the market.


QD Laser has already started shipping samples of QLD0593-P05, a module with 5 mW output power. In addition, it plans to start shipping high power samples of QLD0593-P50, a module with > 50 mW output power, in April, 2012 with mass production commencing from the 4th quarter of 2012.


QD Laser markets 1064 nm band DFB laser modules, mainly for industrial applications including as a seed source for fibre lasers, and has already shipped them to more than 30 companies worldwide. QD Laser’s in- house epitaxial growth and grating technology provides the flexibility to handle a wide range of wavelength bands and is now extending the wavelength line-up of DFB laser modules from 1030 to 1300 nm.


The firm says it also has the potential to extend wavelength line-up by combining with a wavelength conversion technology in visible wavelength regions like 515 nm and 555 nm for special green laser or 560 nm and 590 nm for yellow to orange colours. QD Laser will continue these unique technical developments to meet market requirements.


B&W Tek to demonstrate tiny fibre-optic Raman probe


The micro lensed tool will be exhibited at SPIE’s BiOS & Photonics West conferences


B&W Tek, an advanced instrumentation company producing optical spectroscopy and laser systems, has revealed the BAC200 Raman probe.


The firm says this is the first fibre optic Raman probe capable of delivering the performance of a larger probe; it has a diameter of less than 4mm with enhanced optical collection power.


The BAC200’s design enables both immersion and direct contact measurements, allowing for measurements and applications previously not possible with standard Raman probes. The fused silica tip is housed in a stainless steel needle tube, allowing for a scratch resistant, easy to clean probe. Unlike other commercially available lensed fibre optic probes, the optical elements in the BAC200 are permanently fixed in alignment, with no possibility of movement due to impact or vibrations.


“The small size, flexibility, and durability of the BAC200 micro Raman probe make it ideal for analysis in small sample size biological and biomedical applications,” says Travis Thompson, Raman Product Specialist at B&W Tek. “This marks a leap forward for scientists performing molecular level spectroscopic analysis by allowing them to perform in vivo analyses of specimens without creating


January / February 2012 www.compoundsemiconductor.net 149


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