Direct RF to optical frequency measurements with a femtosecond laser comb

2001 ◽  
Vol 50 (2) ◽  
pp. 552-555 ◽  
Author(s):  
S.A. Diddams ◽  
D.J. Jones ◽  
J. Ye ◽  
S.T. Cundiff ◽  
J.L. Hall ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Optical Frequency ◽  
Frequency Measurements

scholarly journals An Optical Frequency Domain Angle Measurement Method Based on Second Harmonic Generation

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 670
Author(s):  
Wijayanti Dwi Astuti ◽  
Hiraku Matsukuma ◽  
Masaru Nakao ◽  
Kuangyi Li ◽  
Yuki Shimizu ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Second Harmonic Generation ◽  
Frequency Domain ◽  
Harmonic Generation ◽  
Measurement Method ◽  
Second Harmonic ◽  
Angle Measurement ◽  
Laser Source ◽  
Optical Frequency ◽  
Measurable Range

This paper proposes a new optical angle measurement method in the optical frequency domain based on second harmonic generation with a mode-locked femtosecond laser source by making use of the unique characteristic of the high peak power and wide spectral range of the femtosecond laser pulses. To get a wide measurable range of angle measurement, a theoretical calculation for several nonlinear optical crystals is performed. As a result, LiNbO3 crystal is employed in the proposed method. In the experiment, the validity of the use of a parabolic mirror is also demonstrated, where the chromatic aberration of the focusing beam caused the localization of second harmonic generation in our previous research. Moreover, an experimental demonstration is also carried out for the proposed angle measurement method. The measurable range of 10,000 arc-seconds is achieved.

Progress in optical frequency measurements at BNM-SYRTE

2004 ◽  
Author(s):  
A. Brusch ◽  
D.B. Kolker ◽  
J-j. Zondy ◽  
O. Acef ◽  
J.P. Wallerand ◽  
...  
Keyword(s):  
Optical Frequency ◽  
Frequency Measurements
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