Noise suppression in Ti:sapphire laser-based electro-optic sampling

Abstract

High coherent bi-chromatic laser with gigahertz splitting produced by the high diffraction orders of acousto-optic modulator used for coherent population trapping experiments Rev. Sci. Instrum. 82, 123104 (2011) Self-mixing interferometry in vertical-cavity surface-emitting lasers for nanomechanical cantilever sensing Appl. Phys. Lett. 94, 091103 (2009) Field fluctuations and spectral line shape in semiconductor lasers subjected to optical feedback J. Appl. Phys. 95, 7573 (2004) Supermode-noise suppression using a nonlinear Fabry-Pérot filter in a harmonically mode-locked fiber ring laser Appl. Phys. Lett. 81, 4520 (2002) Modulation doped InGaAsP quantum well laser emitting at 1.55 μm J. Appl. Phys. 90, 38 (2001) Additional information on Appl. Phys. Lett.

Double modulated differential THz-TDS for thin film dielectric characterization

“…In Fig. 1(b) we show the noise spectrum of our Tray system, which uses balanced photodiode (PD) detection [56,57]. If the modulation frequency is set to 3 kHz or higher, the noise level drops by an order of magnitude compared to a modulation frequency of 100 Hz or lower.…”

Noise Reduction in Terahertz Thin Film Measurements Using a Double Modulated Differential Technique

“…In Fig. 1(b) we show the noise spectrum of our T-ray system, which uses balanced photodiode (PD) detection [57,58]. If the modulation frequency is set to 3 kHz or higher, the noise level drops by an order of magnitude compared to a modulation frequency of 100 Hz or lower.…”

A Theoretical and Experimental Research on Terahertz Electro-Optic Sampling at Near-Zero Optical Transmission Point

“…For Ti:sapphire laser-based EO sampling, according to the description in Ref. [13], the noise generated from the laser wavelength shift is much smaller than that from the laser intensity fluctuation. In our case, the EO sampling operates at near zero optical bias, and if the acquisition time is short enough, it is reasonable to neglect the influence of laser wavelength shift.…”

“…( 1) in Ref. [13], from Eq. ( 6), the noise from laser intensity fluctuation (∆I x0 , ∆I y0 ) can be written as…”

“…A neutral attenuator is used in front of the polarizer P 0 to change the probe beam power. In order to avoid the effect of laser wavelength shift, [13] the integral time of the DMM is set as short as 10 ms. The theoretical fit curve (solid line) by Eq.…”