Synchronously pumped picosecond Raman laser utilizing an LiIO₃crystal

Stimulated Raman Scattering in Alkali-Earth Tungstate and Molybdate Crystals at Both Stretching and Bending Raman Modes under Synchronous Picosecond Pumping with Multiple Pulse Shortening Down to 1 ps

“…It can be seen from Figure 8a,b that SRS generation was observed only in a narrow range of the positive cavity length detuning from 0 up to +50 µm while the detuning range was essentially wider at the negative cavity length detuning (from 0 down to −220 µm). It is similar as in other synchronously pumped Raman lasers [65][66][67][68][69][70][71][72][73][74][75][76][77][78] and can be explained by non-efficient interaction between the pump and SRS pulses when only the leading edge of the SRS pulse is amplified at positive detuning. However, namely positive detuning (up to +50 µm) of the cavity length has allowed to obtain the strongest SRS pulse shortening, as can be seen from Figure 8c,d.…”

“…The individual pump pulses can be shorter than τ c and even ultra-short realizing transient SRS in a cavity. Such systems are synchronously pumped Raman lasers [67][68][69][70][71][72][73][74][75][76][77][78][79][80][81][82]. If we use a train of ultra-short pulses with the pulse train duration of t p at the individual pulse duration of τ p , the extracavity synchronously pumped SRS oscillation threshold will be defined by expression (12) where τ p should be replaced with t p and p = 1 for both ring and linear cavities (at τ p < τ c we have gain only in the forward direction) but the SRS gain G (and its threshold value G th in expression (12)) is defined by τ p as before by expression (8).…”

Multi-wavelength, all-solid-state, continuous wave mode locked picosecond Raman laser

“…Using a cavity around a Raman medium allows effective control over the conversion and cascading of the SRS process to second and higher Stokes orders, allowing the desired Stokes order to be selectively output and even allowing several wavelengths to be output simultaneously. Synchronously pumped Raman lasers have been demonstrated as an efficient route for the generation of picosecond pulses at certain visible and IR wavelengths [6,7].…”

Ti:sapphire-pumped diamond Raman laser with sub-100-fs pulse duration

“…Synchronously pumped Raman lasers have the potential to efficiently and controllably convert ultrafast pulse trains, even with nanojoule pulse energies [6][7][8][9][10][11][12]. In these lasers, the round-trip time of the pump laser and an external Raman laser cavity are matched, resulting in active-mode-locked operation of the Raman laser output.…”

“…The choice of cavity mirrors is then used to control the Raman cascade and efficient output of a selected Stokes order. Synchronous pumping of Raman laser media has been demonstrated in gases [6] and liquids [7] and in crystals in the visible [8][9][10], UV [11], and near-IR [12] spectral regions. These systems used picosecond pump pulses, the duration of which is comparable to the phonon dephasing time, T 2 , of the Raman materials (typically a few picoseconds).…”