Compact high power yellow laser for bio-instrumentation

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The aim of this project is to develop a prototype of 561 nm laser suitable for laser lighting required in medical**and analytical & life science. Temperature insensitive PPLN with a quasi-phasing wavelength of 561 nm will**be developed so that efficient second harmonic generation (SHG) can be achieved from 1122 nm to 561 nm**over a broad temperature range. The developed PPLN will then be packaged into a compact footprint to form a**yellow laser by employing the established compact DPSS laser platform in PI's group. Performance of**developed compact laser will be tested and optimized in terms of laser output power, beam profile, and power**stability.**Yellow laser emitting at a wavelength of 561 nm is specially required in many bio-applications, such as**excitation of new dyes or nanodots used in confocal microscopy and flow cytometry, and multi-channel laser**Doppler velocimetry. Despite the progress on the development of 561 nm yellow lasers, the reported 561 nm**lasers cannot satisfy simultaneously the laser lighting requirements for medical and analytical & life science**applications, i.e. compact, low-cost, and high power. Recently, by employing efficient periodically poled**lithium niobite (PPLN) optical nonlinear crystal, we have developed a compact low-cost diode pumped solid**state (DPSS) laser platform, which can achieve watt level green lasers with the highest output power and**smallest footprint in the class. In the proposed project, a prototype 561 nm laser will be developed based on the**established compact low-cost PPLN DPSS laser platform in PI's group.