The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A two color far-infrared (FIR) laser interferometer and polarimeter using 5.2- and 6.3-THz CH3OD lasers pumped by a 9R(8) CO2 laser has been developed for future plasma diagnostics. The pump 9R(8) CO2 laser has been stabilized by an external Stark-cell modulation. The performances are the power stability of 108 ± 0.6 W/hour and the frequency stability of ± 230 kHzp-p/hour at the line center.
Multi-line far-infrared (FIR) gas lasers from a single laser cavity have been development in order to apply ITER diagnostics. By using two pump CO2 lasers with different wavelength and mixed gas of CH3OH and CH3OD, we succeeded in the simultaneous oscillations of three-color FIR lasers of 48, 57, 119 µm in wavelength.
A two color far-infrared (FIR) laser interferometer of beat modulation type using 48- and 57-mum CH3OD lasers pumped by 9R(8) CO2 laser has been developing for plasma diagnostics. The pump 9R(8) CO2 laser frequency, 48- and 57-mum CH3OD laser outputs and FIR beat frequency have been stabilized preliminary. The power stability of pump CO2 laser of < plusmn 0.6 % and the frequency stability of <...
A far-infrared (FIR) laser wavelength has been determined from refractive index of silicon with high resistivity (~2.8 kOmega-cm). A wavelength of a 48-mum CH3OD laser pumped by continuous wave (cw) 9R(8) CO2 laser has been measured at five significant figures. The wavelength and the refractive index are 47.661 plusmn 0.005 mum and 3.4147 at 9.6degC, 3.4164 at 19.4degC, and 3.4180 at 28.8degC. A known...
Simultaneously oscillated multi-line FIR lasers from a single FIR laser cavity pumped by two wavelength CO2 lasers have been developed for plasma diagnostics and the other applications. We have obtained simultaneous oscillations as following : (i) 60.5- and 118.8 mum-CH3OH lasers from pumping by 9R(18) CO2 laser and 9P(36) CO2 laser, (ii) 70.5- and 118.8-mum CH3OH lasers from pumping by 9P(34) CO2...
A two-color interferometer system using 48-and 57-μm CH3OD lasers pumped by a continuous-wave (cw) 9R(8) CO2 laser have been developed to measure electron density profiles of large plasma devices. To test this system, the Michelson interferometer of one channel has been constructed on a test bench. We have obtained preliminary interference signals from the two-color interferometer system.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.