Title :
Optically pumped rubidium as a frequency standard at 196 THz
Author :
Breton, Marc ; Tremblay, Pierre ; Julien, Cyril ; Cyr, Normand ; Tetu, M. ; Latrasse, Christine
Author_Institution :
Dept. de Genie Electr., Laval Univ., Que., Canada
fDate :
4/1/1995 12:00:00 AM
Abstract :
The performance of 196.0-THz (1529-nm) DFB lasers frequency-locked to absorption lines of a rubidium vapor optically pumped at 384.2 THz (780.2 nm) is studied. The absorption profiles of the pumped vapor are measured under various conditions and compared with theoretical predictions. A bright resonance resulting from the cascade of two cycling transitions is characterized both experimentally and theoretically. The measured frequency stability of a DFB laser frequency-locked to this line reaches a level of 2×10-10 for an averaging time of 100 s when compared to a similar laser locked to an acetylene line
Keywords :
frequency measurement; measurement standards; optical pumping; resonant states; rubidium; 100 s; 1529 nm; 196 THz; 780.2 nm; DFB lasers; Rb; Rb vapor; absorption lines; absorption profiles; acetylene line; averaging time; bright resonance; cascade; cycling transitions; frequency stability; frequency standard; optically pumped rubidium; pumped vapor; Absorption; Frequency; Laser excitation; Laser stability; Laser theory; Laser transitions; Optical pumping; Pump lasers; Quantum cascade lasers; Resonance;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
