In this paper, high power and high efficiency operation of an all solid state, quasi-continuous-wave, Ti: sapphire laser is obtained with a laser diode pumped frequency doubled Nd: YAG laser. Discussing the output characters with three kinds of oscillate cavity, we acquire high output power, high light quality Ti: sapphire laser with flat to flat oscillate cavity. The maximum output power is 6.1W at 797nm with pump power of 27W, conversion efficiency is 22.6%, FWHM is 38.4ns and M2 is 3.6. Tuning by birefringent filter, all solid state titanium doped sapphire laser's output wavelength is from 750~950nm and average output power is 4.7W.
Pump-tuning method is very important and useful to OPO because it can relieve the OPO of any requirement for crystal translation or temperature variation. In this way, using PPLN crystal with poled period of 20.5mm, 1017~3384nm quasi-continuous-wave output is obtained pumped by Ti: sapphire laser which is tuned from 770 to 820nm. The maximum output power is 1.9W at 1208nm and conversion efficiency is 32%.OPO's average output power is 1.3W in whole output wavelength.
High-power red laser are of great interest in the fields of medical application, laser display and also as a pumping source for tunable lasers such as Cr:LiSAF. This letter reports the generation of a 12W Q-CW red laser beam by intracavity frequency-doubling of a Nd:YAG laser operating at 1.3μm with a KTP crystal. A laser module that consisting of a Nd:YAG rod side-pumped by thirty 20W LDs of a triangle radial pump geometry, a acousto-optic Q switch and a KTP crystal were used in the experiment. Because the efficiency of SHG is sensitive to the type II phase-matching angles of KTP, we calculate the value of phase-matching angles according to several of Sellemier equations of KTP, and modify the phase-matching angles to θ=59.9° and φ=0° by experiment. The maximum average power of 12W of red laser is achieved at 10KHz when the pump power of LDs is about 470W.
This paper reports a high output power, high conversion efficiency, all-solid-state, quasi-continuous-wave Ti:sapphire laser system pumped by frequency-doubled Nd:YAG laser with DPL and by employing it as a pump source, we got the tunable broadband wavelength varying from 750nm to 950nm. Comparing with correlative research fields, two uppermost improvements were achieved, including the topmost output power and its broadband tuning. To ensure the ideal broadband output of Ti:sapphire laser, two sets of Ti:sapphire resonator mirrors were used respectively One is from 750 to 850nm, the other is from 850 to 950nm. Because the centric wavelength of the resonator laser is nearly 795nm, the maximum of the Ti:sapphire laser output power we obtained was 6W with the first set of mirror and the transmission rate of the output mirror is 10%. The power tops this field so far and the higher conversion efficiency is 22.2%. The second set of mirror we used can generate the output power of 3W, which is high enough to achieve broadband tuning for the future. And then, by using a tunable and line width compressed implement-birefringent filter which was Brewster angle placed, we achieved continuous tuning from 750nm to 950nm with reasonably high power.