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Semi-analytical model of Raman generation in silicon-on-insulator rib waveguide with DBR/F-P resonator

Tyszka-Zawadzka A., Szczepański P., Mossakowska-Wyszyńska A., Karpierz M., Bugaj M.

Opto-Electronics Review

2013

Vol. 21, No. 4

382-389

An approximate method of modelling of Raman generation in silicon-on-insulator (SOI) rib waveguide with DBR/F-P resonator including spatial field distribution and nonlinear effects such as Raman amplification and two photon absorption (TPA), is developed. In threshold analysis of steady-state Raman laser operation, an analytical formula relating threshold pump power to the system parameters is obtained. The analysis of the above threshold operation is based on an energy theorem. In exact energy conservation relation, we approximate the Stokes field distributions by that existing at the threshold, whereas the approximate pump field distributions are obtained by integrating the equations for the pump signal using the linear (threshold) pump field distributions and the threshold Stokes field distributions. An approximate, semi-analytical expression related the Raman output power to the pump power and system parameters is derived. Our calculations remain in a good agreement with the exact numerical solutions.

The 1.3 mu m Q-switched Nd:YAG laser.

Ostrowski R., Marczak J.

Optica Applicata

2001

Vol. 31, nr 3

553-562

The paper presents experimental results of investigation of flash lamp pumped Nd:YAG laser operated at wavelength lambda =1.32 mu m. Thresholds and resonator losses have been determined. In the active Q-switched mode, output pulses up to 29 mJ energy and pulse width of 37 ns have been obtained. Moreover, an intracavity Raman laser producing 1.53 mu m radiation when pumped by Nd:YAG laser operated at 1.32 mu m is presented. Output Raman pulses up to 10 mJ energy have been obtained. Raman beam cleanup and 36% energy conversion efficiency, have been observed.

1.3 [my]m ND:YAG laser passively and actively Q-switched

Ostrowski R., Marczak J., Mierczyk Z.

Journal of Technical Physics

2000

Vol. 41, no 3

295-309

The paper presents experimental results of investigation of flashlamp pumped Nd:YAG laser operated at, wavelengths lambda = 1.318 [my]m, lambda = 1.338 [my]m, lambda = 1.356 [my]m, lambda = 1.414 [my]m and lambda = 1.444 [my]m. Thresholds and resonator losses at these lines have been determined. The laser was also operated at line 1.318 [my]m in the Q-switched mode, both active and passive. In active Q-switching, output pulses up to 29 mJ energy and pulsewidth of 4l ns have been obtained. In passive Q-switching with V'3+:YAG crystalline saturable absorber, on the other hand, output pulses up to 4.5 mJ energy and 35 ns duration have been generated. Moreover, an intracavity Raman laser producing 1.53 [my]m radiation when pumped by Nd:YAG laser operated at 1.318 [mi]m is presented. Output Raman pulses up to 10 mJ energy have been obtained. Raman beam cleanup and 36% energy conversion efficiency have been observed.