High Resolution Spectroscopy of Calcium Atoms [chapter]

J. C. Bergquist, R. L. Barger, D. J. Glaze
1979 Laser Spectroscopy IV  
The recent r e s u l t s on saturated absorption o p t i c a l i n t e r f e r e n c e spectroscopy of calcium are presented. The photon r e c o i l s p l i t t i n g o f t h e Ca ' S o -3P1 intercombination l i n e at. 657 nm has been f u l l y resolved. Linewidths as narrow as 3 kHz h a l f w i d t h h a l f maximum i n t e n s i t y (HWHM) are reported f o r r a d i a t i o n beams s p a t i a l l y separated by up t o 3.5 cm. Second order Doppler i s shcwn t o be the present l i m i t a t i
more » ... ent l i m i t a t i o n t o t h e accuracy o f t h i s technique. Methods are discussed which could lead to-an o p t i c a l wavelength/ frequency standard w i t h an accuracy o f b e t t e r than 10 14.
doi:10.1007/978-3-540-38950-7_14 fatcat:qrj2ava7cjdb5fpnyrn7an77s4