Generation of 66-µm optical parametric oscillation with periodically poled LiNbO_3

Abstract

Greater than 6-microm-oscillation was demonstrated by means of optical parametric oscillation with periodically poled LiNbO3 (PPLN). The interaction length and thickness were 40 mm and 500 microm. The pump source used was a Q-switched Nd:YAG laser with a pulse duration of 120 ns and a repetition rate of 1 kHz. The tuning ranges of the idler waves were 6.57-6.56, 6.22-6.12, and 6.06-5.94 microm for PPLN wafers of 20-, 21.3-, and 22-microm periods, respectively.

Single-pass sum-frequency-generation of 589-nm yellow light based on dual-wavelength Nd:YAG laser with periodically-poled LiTaO_3 crystal

“…The advantage of using PPLT as the nonlinear frequency converter lies in the fact that quasiphase-matching (QPM) allows the use of the highest nonlinear coefficient d 33 for highefficiency SFG [10]. For SFG process of 1064 and 1319 nm, the grating period can be calculated using the Sellmeier equation of congruent LT crystal where the momentum conservation should be satisfied [11].…”

Nonlinear generation of a neat semi-Gaussian laser beam with a transversely varying periodically-poled LiTaO_3 crystal

“…is the wave vector of the SH light, k   is the wave vector of the pump laser and G  is the reciprocal vector provided by the TPPLT crystal. The advantage of using TPPLT as the nonlinear frequency converter lies in the fact that QPM allows the use of the highest nonlinear coefficient d 33 [23]. The TPPLT sample used in our experiment is designed to be a periodic structure with a period of 7.505μm, which carries out the SHG process of 1064 nm to achieve green light at 532nm by using its first-order QPM.…”

Simultaneous broadband Raman cascading and parametric conversion in potassium titanyl phosphate

“…Another limitation arises from silica, which is the main constituent of optical fibers and is only transparent between 0.35 and 2.5 μm. Advantageously, most nonlinear crystals can tolerate significantly higher pump power while their transparency is typically extended in the infrared [3]. Therefore, several alternative approaches have been developed in recent years for broadband light generation in nonlinear crystals.…”