Title :
Heterodyne frequency measurements of FIR laser lines around 1.2 and 1.6 THz
Author :
Carelli, G. ; Moretti, A. ; Pereira, D. ; Strumia, F.
Author_Institution :
Dipartimento di Fisica, Pisa Univ., Italy
fDate :
1/1/1995 12:00:00 AM
Abstract :
We present the frequency measurements of 14 far-infrared (FIR) laser lines. We use the heterodyne technique of mixing FIR laser transitions and microwave radiation on a MIM point contact diode to determine the FIR frequencies. The main motivation was to measure the frequency of laser lines of metrological interest, around the 1.6 and 1.2 THz regions. We also present 15 new FIR laser lines we found while performing the frequency measurements, with wavelengths ranging from 90 μm to 819.2 μm. All of them are characterized in wavelength, polarization, intensity, working pressure and absorption offset
Keywords :
atomic clocks; caesium; demodulation; frequency measurement; gas lasers; infrared sources; laser frequency stability; laser transitions; optical modulation; optical pumping; 1.2 THz; 1.6 THz; 90 mum to 819.2 nm; Cs; Cs atomic clock; Cs vapour laser; FIR frequencies; FIR laser line; FIR laser lines; MIM point contact diode; absorption offset; far-infrared laser lines; frequency measurements; heterodyne frequency measurements; intensity; laser lines; metrological interest; microwave radiation; polarization; wavelength; working pressure; Absorption; Diodes; Finite impulse response filter; Frequency measurement; Laser transitions; Masers; Microwave theory and techniques; Performance evaluation; Polarization; Wavelength measurement;
Journal_Title :
Quantum Electronics, IEEE Journal of
