Abstract:
PROBLEM TO BE SOLVED: To provide a more efficient and economical analysis system in CARS microscopy or spectroscopy.SOLUTION: A system is disclosed for providing a first electromagnetic field and a second electromagnetic field to vibrational analysis equipment that is responsive to a difference between first and second frequencies of the first and second electromagnetic fields respectively. The system includes a non-linear crystal that may be pumped at a high repetition rate to provide a pulsed signal field at a signal field frequency and a pulsed idler field at an idler field frequency as output. The signal field provides the first electromagnetic field and the idler field provides the second electromagnetic field. The system also includes a tuning system for allowing the difference between the signal field frequency and the idler field frequency to be changed. The system also includes an output unit for providing the first and second electromagnetic fields to the vibrational analysis equipment.
Abstract:
The invention relates to a wavelength spectroscopy device comprising, on a substrate a filter cell CF constituted by two mirrors separated by a spacer membrane, the filter cell being made up of a plurality of interference filters. Furthermore, the device also comprises an emission cell CE comprising a plurality of emission sources, each of said sources being associated with one of said interference filters.
Abstract:
PROBLEM TO BE SOLVED: To realize a device for measuring an optical-absorption coefficient of a sample at a high sensitivity.SOLUTION: A ring-down spectral device uses a wavelength-variable femtosecond soliton pulse light source 1. Pulsed light is input to a looped optical fiber 6 through a first optical transmission path 4 and an optical change-over switch 5. Ring-down pulsed light is input to a homodyne detector 40 through the optical change-over switch 5. Meanwhile, pulsed light transmitting through the first optical transmission path 4 is input to each optical transmission path constituting a second optical transmission path 20, in a branching manner, through an optical directional coupler 8 and a first optical switch element 12. The pulsed light transmitting through the second optical transmission path 20 is input to the homodyne detector 40 as reference light and is synchronously detected. Optical path length of multiple optical transmission paths constituting the second optical transmission path 20 sequentially differs by the length of optical fiber 6, and each of the optical transmission paths can microscopically fluctuate the optical path length.
Abstract:
PROBLEM TO BE SOLVED: To attain low power consumption and a long life in a light source, while suppressing deterioration in measurement precision in a colorimeter, and also to improve measurement precision in a spectroscopic analyzer.SOLUTION: A spectrometric instrument includes: a light source 30; a light source drive part 10 including a power control part 12 for controlling the drive power of the light source; a measurement optical system 40 including a spectroscopic part 34 for dispersing light in accordance with each wavelength; a light reception part 50 (50') for receiving reflection light or transmission light from a sample 32 (32') being a measurement object, which passes through the measurement optical system, and converting the light into an electric signal; and a measurement part 60 for measuring light reception intensity corresponding to the wavelength of the light, based on the electric signal to be obtained from the light reception part. The power control part 12 changes power to be applied to the light source by association with the wavelength of the light in accordance with at least one among the spectroscopic characteristic of the light source, the spectroscopic characteristic of the measurement optical system, and the light reception sensitivity characteristic of the light reception part.
Abstract:
Exemplary embodiments of apparatus according to the present disclosure are provided. For example, an apparatus for providing electromagnetic radiation to a structure can be provided. In one exemplary embodiment, the apparatus can provide at least one electromagnetic radiation, and include at least one first arrangement which can be configured to generate the electromagnetic radiation(s) having at least one wavelength that varies over time. The exemplary apparatus can also include at least one second arrangement which can be configured to power the first arrangement(s) independently from an external power source. In another exemplary embodiment the apparatus can include at least one particular arrangement which is configured to generate the electromagnetic radiation(s) having at least one wavelength that varies over time. The particular arrangement(s) can include a resonant cavity that has a roundtrip optical transit time of approximately less than 0.7 nsec.
Abstract:
PROBLEM TO BE SOLVED: To provide a light source apparatus capable of producing stable oscillation and performing high-speed wavelength sweeping over a desired wavelength range. SOLUTION: A wavelength swept light source apparatus in which oscillation wavelength is continuously changeable includes a resonator comprising therein: an optical amplification medium that amplifies light; a first device which disperses light emitted from the optical amplification medium in accordance with the wavelength of the light; a second device comprising non-focusing optical elements for collimating the beams having different wavelengths dispersed by the first device; and a selecting device for selecting a beam having a specific wavelength among the beams collimated by the second device. The beam having the specific wavelength selected by the selecting device is fed back to the optical amplification medium by the swept light source apparatus. COPYRIGHT: (C)2011,JPO&INPIT