Abstract:
According to one aspect, the invention relates to a laser emission device for the spectroscopic analysis of a sample, comprising: a primary laser source (401) emitting a pump beam (I5) and an excitation beam (I2), said two beams being pulsed and having a nanosecond or subnanosecond pulse time; a non-linear optical fibre (406) into which the excitation beam is injected in order to form a probe beam (I4) having a wide spectral band; a device (405) for controlling the time profile of either the pump beam or the excitation beam, allowing compensation of the time spreading of the probe beam generated by the non-linear optical fibre, in order to obtain pump and probe beams having similar pulse times; and means (409) for spatially overlaying of the pump and probe beams for the spectroscopic analysis of the sample.
Abstract:
An optical system includes a laser source operable to output a laser beam at a fundamental wavelength and a frequency conversion system. The frequency conversion system includes a frequency doubler module including a first plurality of nonlinear optical crystals and a frequency tripler module including a second plurality of nonlinear optical crystals. The optical system also includes a control system coupled to the frequency conversion system and a diagnostics system coupled to the frequency conversion system.
Abstract:
PROBLEM TO BE SOLVED: To provide a wavelength conversion device and a method for wavelength conversion that converts a wavelength of signal light into an arbitrary wavelength thereof without depending on a modulation system of the signal light.SOLUTION: A wavelength conversion device comprises a first nonlinear medium which outputs, based on an optical power of a signal light input, the signal light having a longer wavelength than the wavelength of the signal light input thereto, a second nonlinear medium which outputs a signal light having a wavelength based on the wavelength of the signal light input and a wavelength of light input from a light source, the first nonlinear medium and the second nonlinear medium are arranged so as to be input an output from one of the first nonlinear medium or the second nonlinear medium to the other one, and the input signal light input to the own device is converted the wavelength thereof to output as an output signal light.