Broadband Coherent Anti-Stokes Raman Scattering Spectroscopy Using Pulse-Shaper-Controlled Variable-Wavelength Soliton Pulses from a Photonic Crystal Fiber

Abstract

The optical properties of the magnetic field in the neighbourhood of two equal co-axial magnetic poles of opposite polarity used as a magnetic prism are discussed.In this first part attention is confined to rays in the plane of symmetry between thi? poles over

Broadband coherent anti-Stokes Raman scattering spectroscopy using soliton pulse trains from a photonic crystal fiber

“…The uses of fundamental soliton pulses from a PCF as Stokes pulses, where their center wavelengths were controlled by the power variation of an input pulse, were reported [8,9]. We have observed broadband CARS signals between 500 and 3100 cm À1 of polymer samples by the use of six soliton pulses with different center wavelengths [10]. In this study, both the center wavelengths and the delay times of soliton pulses were controlled simultaneously by shaping the input pulse of a PCF by the use of a pulse shaper and these parameters were switched automatically in measurement.…”

Broadband Coherent Anti-Stokes Raman Scattering Microspectroscopy Using the Soliton Pulses From a Photonic Crystal Fiber — Observation of Raman Line in Diamond Powders

“…The other pulse was used as a Stokes pulse after its phase was modulated by a pulse shaper and propagated in a PCF (Crystal Fibre NL-1.5-590) to generate wavelength-variable soliton pulses. 4 The spectra of pump and Stokes pulses are shown in Fig. 2.…”

“…3 We have observed broadband CARS signals between 500 and 3100 cm −1 of polymer samples by the use of the soliton pulses generated from a PCF. 4,5 In this study, the CARS spectrum of diamond powders (average diameter 6 µm) was measured and Raman scattering line shapes were obtained by a nonlinear fitting procedure. In CARS spectroscopy, it is necessary to use a nonlinear fitting procedure to extract the resonant line shape since the CARS signal contains both nonresonant and resonant components.…”

Single-Beam Coherent Anti-Stokes Raman Scattering Spectroscopy Using Both Pump and Soliton Stokes Pulses from a Photonic Crystal Fiber

“…In this paper, we demonstrate a novel setup for single-oscillator CARS spectroscopy using a single beam, where a Stokes pulse and a pump pulse are generated by the combination of a pulse shaper and a photonic crystal fiber (PCF) of anomalous dispersion. In this setup, two pulses, one for generating a wavelength-tunable fundamental soliton pulse 8) and the other for generating a narrowband pump pulse, are shaped by a pulse shaper and inputted into a PCF. The fundamental soliton Stokes pulse is generated by redshifting the input pulse spectrum through the soliton self-frequency shift (SSFS) 9) in a PCF.…”