Vibrational Stimulated Raman Emission from Dibromomethane as Seed Beam for Four-Wave Rotational Raman Mixing in Hydrogen

Abstract

It is demonstrated that the mobility and number fluctuations in an n-channel metal oxide semiconductor field effect transistor (n-MOSFET), which has a shallow-doped channel, can be separately measured. The mobility fluctuation becomes the dominant source of noise in the case where a negative gate voltage is applied. This is because carriers are not near the Si/SiO interface. If a positive gate voltage is applied to the MOSFET, carriers exist near the Si/SiO interface, so that noise due to the number fluctuation becomes dominant.

Transverse effects in ultrabroadband multifrequency Raman generation

“…However, even when transverse effects are fully taken into account, bandwidths of the order of the carrier frequency that span the whole visible spectrum and beyond result. This conclusion is consistent with experiments [7][8][9][10][11][12][13] that have involved a range of different Raman systems and that have similarities to the specific configuration modeled here. The evolving power spectra and beam shapes in individual frequency channels have been examined and explained in terms of the constituent parametric and nonparametric process, phase-matching conditions, and the frequency dependence of diffractive coupling lengths.…”

“…[1][2][3][4][5][6][7][8][9][10][11][12][13] UMRG differs from conventional Raman conversion schemes in that two input beams of comparable intensity and shape are employed whose frequency separation matches the highestgain Raman resonance of the medium. This scheme is called resonant symmetric pumping, and its advantage is that a very wide comb of both Stokes and anti-Stokes components is rapidly generated.…”

Transverse effects in ultra-broadband multifrequency Raman generation

“…Ultrabroadband multifrequency Raman generation (UMRG) is unique among nonlinear optical interactions in terms of the number of distinct frequencies of comparable energy that can be generated. [1][2][3][4][5][6][7][8][9][10][11][12][13] UMRG differs from conventional Raman conversion schemes in that two input beams of comparable intensity and shape are employed whose frequency separation matches the highestgain Raman resonance of the medium. This scheme is called resonant symmetric pumping, and its advantage is that a very wide comb of both Stokes and anti-Stokes components is rapidly generated.…”