9/1/2023 0 Comments Inpho 5.6 application masterThe Ti:S is shown to have a cut-off frequency around 500 kHz, which means that noise structures of the pump laser above this frequency are strongly suppressed. In particular, the cascaded system is seen to exhibit higher RIN than a setup with only a single nonlinear crystal. The frequency doubled light is shown to have a higher RIN than the fundamental light. It is demonstrated that improving the electrical noise provides an easy method for reducing the relative intensity noise (RIN) in all stages. Noise features originating from the electric power supply are evident throughout the whole transfer chain. This investigation includes electrical noise characterizations of the utilized power supplies, the optical noise of the fundamental light, the second harmonic light, and finally the optical noise of the femtosecond pulses emitted by the Ti:S laser. This system consists of a DBR tapered diode laser, which is frequency doubled in two cascaded nonlinear crystals and used to pump the Ti:S laser oscillator. In this paper, we investigate the noise performance and transfer in a titanium sapphire (Ti:S) laser system.
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