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We have developed a simple laser system for generation of coherent 556 nm light by using frequency doubling of a diode laser. 1112 nm light from an external cavity diode laser is amplified via Yb-doped fiber amplifier and 200 mW of the amplified light is injected to wave-guided MgO-doped PPLN, which produces a 30 mW green light. The frequency diode laser is stabilized to a resonance peak of a high-finesse...
We describe a fiber-based acetylene-stabilized laser, where light is coupled to free-space only to pass through the acetylene cell. The system is constructed using standard components, which makes the approach cost effective and straightforward to implement. The Doppler-free spectrum of acetylene is detected using a simple collinear pump-probe geometry, even without a lock-in amplifier, when the length...
A monolithic-ring-cavity Yb:YAG laser is frequency doubled and used to perform Doppler-free spectroscopy of molecular iodine at 515 nm. The Allan standard deviation of the iodine-stabilized Yb:YAG laser is better than 6.2times10-14 for a 10-s averaging time, which is limited by the stability of the H-maser involved in the frequency measurement using an optical comb.
This paper describes the current status of an ytterbium lattice clock under development at KRISS. After the success of 399 nm magneto-optical-trap (MOT) at a temperature 1 mK, we constructed the 2nd stage cooling laser system at a wavelength of 556 nm to cool atoms further down to several muK. We are also developing an ultra-narrow linewidth laser at a wavelength of 578 nm to probe the clock transition...
An integrative external-enhancement ring cavity has been designed to acquire 461 nm blue light source with high output power. Using a 30-mm-long quasi-phase-matched periodically-poled KTP doubling crystal, we have obtained total more than 210 mW blue light from 287 mW coupling incident power with the net conversion efficiency over 70%.
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