Tunable blue laser based on intracavity frequency doubling with a fan-structured periodically poled LiTaO3 crystal Article in Optics Letters 27(8):604-6 · May 2002 with 3 Reads DOI: 10.1364/OL.27
Apr 15, 2002 · The concept is based on intracavity frequency doubling in an external resonator geometry with spatial separation of the spectral components. The use of a fan-structured periodically poled LiTaO(3) crystal permits tuning of both the fundamental and the second harmonic simultaneously with one aperture.
Many blue laser systems are based on a frequency-doubled laser in the 0.9-μm region (e.g. 914 nm from Nd:YVO 4). By further frequency doubling (or by sum frequency generation) still shorter wavelengths in the ultraviolet region (→ ultraviolet lasers) become accessible.
Tunable blue laser based on intracavity frequency doubling with a fan-structured periodically poled LiTaO_3 crystal. Efficient third-harmonic generation in partly periodically poled KTiOPO_4 crystal.
Upconversion blue laser by intracavity frequency self-doubling of periodically poled lithium tantalate parametric oscillator
A cw source of 423 nm light is presented. It is based on frequency doubling of the 846 nm output of a single-frequency Ti:Sapphire laser in periodically poled KTP. The doubling crystal is placed in a resonant enhancement cavity and is designed for first-order type I quasi-phase matching.
Jul 26, 2004 · light by frequency doubling of a 50-mW diode laser Kazuhiro Hayasaka, Yun Zhang, Katsuyuki Kasai J.-P. Meyn,” Tunable blue laser based on intracavity frequency doubling with a fan-structured periodically poled LiTaO 3 crystal,” Opt. Lett. 27, 604-606(2002).
Jörg Zimmermann and a team of colleagues based at Philipps University, Marburg, Germany, and Kaiserslautern University, Germany, used a fan-structured crystal of periodically-poled LiTaO 3 (PPLT) to frequency-double a laser-diode emission.
For example, one DBR laser in the range 930-940 nm can be frequency-doubled to the blue and the other laser having a frequency in the range of 1050-1080 nm can be frequency-doubled to the green. This can be done with a Nd doped double clad fiber amplifier.
Next, we tried to generate tunable green light by using intracavity frequency-doubling scheme as shown in Fig. 1. Fig. 4 presented the output characteristics of the green light. We obtained a maximum green power of 520 mW at 526 nm with 6.3 W of absorbed pump power.
a bulk, periodically poled nonlinear frequency doubling crystal disposed between the two mirrors, the crystal having a thickness in the range of 0.5 mm to about 1 mm and comprising material selected from the group consisting of: periodically poled MgO-doped LiNbO 3, periodically poled MgO-doped LiTaO 3, periodically poled ZnO-doped LiNbO 3
Even though the cost for a tunable laser is higher, its use can be economical as a single spare laser can work on any transmission channel where it is needed. As the cost of tunable lasers is no longer much higher than for non-tunable ones, tunable lasers are now often even used throughout.