Development of a portable optical frequency standard with a small calcium cell

Author

Wen-Ling Yang ; Yu-Ping Lan ; Huang-Chi Huang ; Kuo-Ming Chang ; Mao-Sheng Huang ; Jow-Tsong Shy

Author_Institution

Center for Meas. Stand., Hsinchu, Taiwan

fYear

1996

fDate

17-21 June 1996

Firstpage

88

Lastpage

89

Abstract

Calcium atoms could be trapped and locked directly in a small cell (about 20 cm long). A high power injection lock diode laser being frequency doubled to 422.5 nm by through a nonlinear crystal KNbO/sub 3/, is used to trap calcium atoms in the "heart" of the cell. The trapped atoms will be probed by a narrow linewidth extended-cavity diode laser. The diode laser then will be locked to the calcium /sup 3/P/sub 1/-/sup 1/S/sub 0/ intercombination line at 657 nm. The direct cell trapping and locking method makes it become possible to establish a compact high precision optical frequency standard.

Keywords

calcium; frequency measurement; laser accessories; laser beam applications; laser frequency stability; laser mode locking; measurement standards; optical frequency conversion; potassium compounds; semiconductor lasers; /sup 3/P/sub 1/-/sup 1/S/sub 0/ intercombination line; 20 cm; 422.5 nm; 657 nm; Ca atoms; Ca cell; KNbO/sub 3/; direct cell locking; direct cell trapping; extended-cavity diode laser; injection lock diode laser; nonlinear crystal; portable optical frequency standard; trapped atoms; Atom optics; Atomic beams; Calcium; Diode lasers; Frequency; Laser feedback; Laser stability; Nonlinear optics; Optical feedback; Standards development;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements Digest, 1996 Conference on

Conference_Location

Braunschweig, Germany

Print_ISBN

0-7803-3376-4

Type

conf

DOI

10.1109/CPEM.1996.546630

Filename

546630