Abstract:
PROBLEM TO BE SOLVED: To provide a plastic determination device achieving the improvement of accuracy of performing the determination of the kind of plastic on determined plastic having a deformed shape at a place which light is made enter.SOLUTION: In a Fourier transform infrared spectrophotometer 3, the light from a light source 7 is made enter determined plastic 33 via an incident optical system 29, and a detector 27 detects the light from the determined plastic 33 via a light-receiving optical system 31. A plastic determination device 1 determines the kind of the determined plastic 33 on the basis of a detection result of the Fourier transform infrared spectrophotometer 3. A focal distance of the incident optical system 29 is shorter than that of the light-receiving optical system 31.
Abstract:
Provided are an optical pulse generation device and a method for generating an optical pulse capable of generating optical pulse sequences of an arbitrary pattern. An optical pulse generation device (1) comprises a first optical modulator (21) for generating an optical pulse by modulating input light with a first modulation signal (SIG1); a second optical modulator (41) for carrying out modulation with a second modulation signal (SIG2) which is synchronized with said first modulation signal (SIG1) and has a signal pattern that is set such that only a specific part of optical pulses from among said optical pulses is output; and a dispersion compensator (30) for compensating for the chirp of the optical pulse output from said first optical modulator (21).
Abstract:
PROBLEM TO BE SOLVED: To provide an optical pulse generation device and a method for generating an optical pulse capable of generating optical pulse sequences of an arbitrary pattern.SOLUTION: An optical pulse generation device (1) comprises: a first optical modulator (21) for generating an optical pulse by modulating input light with a first modulation signal (SIG1); a second optical modulator (41) for carrying out modulation with a second modulation signal (SIG2) which is synchronized with the first modulation signal (SIG1) and has a signal pattern that is set such that only a specific part of optical pulses from among the optical pulses is output; and a dispersion compensator (30) for compensating for the chirp of the optical pulse output from the first optical modulator (21).
Abstract:
There is provided a method for referencing and correcting the beating spectrum generated by the interference of the components of a frequency comb source. The proposed method allows monitoring of variations of a mapping between the source and the beating replica. This can then be used to compensate small variations of the source in Fourier transform spectroscopy or in any other interferometry application in order to overcome the accuracy and measurement time limitations of the prior art. Constraints on source stability are consequently reduced.