量測結果於Z方向外加電場350伏特時，1064 nm以及1342 nm的繞射效率分別為60 %和55 %。進一步將晶片放置於Nd:YVO4雷射系統中，透過電訊號調制，在攝氏70度時利用單一結構將1064 nm與1342 nm同時進行Q調制以及和頻轉換脈衝式橘黃光雷射輸出，在泵浦5.7瓦特下，可以得到脈寬為8.4 ns、頻寬0.4 nm、脈動雷射間擾動情形8.9 %以及尖端功率512瓦特之脈衝式橘黃光雷射。 ;Compact, high-repetition-rate pulsed visible coherent light sources are attractive for many applications, such as biomedicine, remote sensing, astronomy, and displays. The Q-switched all-solid-state laser technique can be a promising approach to attain such light sources. Moreover, due to the high nonlinearity and highly engineerable characteristics of the quasi-phase-matching(QPM) material, a device as simultaneous a Q-switch and wavelength converter can be realized in a two-dimensional aperiodically poled lithium niobate (APPLN).
In this thesis, we have designed and fabricated a unique 2D APPLN device integrating the functionalities of the Q-switch for two laser lines(1064nm and 1342 nm) simultaneously and sum frequency generator in a Nd:YVO4 laser system to generate pulsed yellow-orange laser, the such device was designed by aperiodic optical superlattice(AOS) technique and optimized by simulated annealing(SA) method.
In operation, 350 volts at repetition rate of 1 KHz drove the device, while the diffraction efficiencies of 1064 nm and 1342 nm of 60 % and 55 % were measured, respectively. At diode pump power of 5.7 watts, a yellow-orange pulse with pulse width of 8.4 ns, bandwidth of 0.4 nm, and peak power of 512 can be obtained, meanwhile, the peak-to-peak fluctuation of 8.9% was also found.
