Theory of solid state Raman laser stationary generation of visible radiation

Spatial and Spectral Effects in Continuous-Wave Intracavity Raman Lasers

“…Monitoring the evolution of g e /A e can inform efforts to maximize and maintain this coupling parameter, which along with minimizing the passive cavity losses [6], [11], [49] is the key to minimize Raman threshold and maximize slope efficiency. Promising routes for improving the spectral behavior include the use of intracavity etalons or birefringent filters for line width control [10], the potential to use Raman materials with broader line widths such as LiNbO 3 that could ameliorate the broadening effect of the Stokes field on the fundamental [10], and intracavity sum-frequency mixing that can suppress unwanted Raman lines [26], [29], [49]. Routes for improving spatial behavior include: using end-capped crystals [5], [44], [50], [51], longer-wavelength pump diodes [13], [39], [52], and thin disk geometries [9]- [12], [23] to reduce the intracavity thermal lens; and using double-end pumping [13] and high-brightness diodes [43], [49], [53] to better control the transverse distribution of absorbed pump power.…”

“…We start by considering a finite-difference model of an intracavity Raman laser, based on that in [24] and considered in several other works [25]- [29]. The equation relating the rate of change of the intracavity Stokes intensity I S with time t is…”

Diode-pumped intracavity yellow–green Raman laser at 560nm with sum-frequency-generation☆☆This research is supported by the National Natural Science Foundation of China (No. 11104161 and No. 11104162 and No. 11104160) and Open Project of State Key laboratory of Crystal Material, (Shandong University, KF1103).

“…The output fundamental and first Raman center spectra of c-cut Nd:VYO 4 were 1066.7 nm and 1178.7 nm. According to [19], the frequency of SFG was determined by ν SL ¼ ν S þ ν L , the theoretical output spectra were the yellow-green laser at 559.9 nm from sum-frequencygeneration of 1066.7 nm and 1178.7 nm. After confirming the output spectra of the Q-switched Raman laser, the laser cavity was designed for SFM of the fundamental laser and the first Stokes laser.…”