System and method for tuning adjusting the central frequency...

Details System and method for tuning adjusting the central frequency... System and method for tuning adjusting the central frequency...

2011-06-28

2011-06-28

Nguyen, Dung T (Department: 2828)

Coherent light generators

Particular beam control device

Tuning

C372S026000, C372S029016, C372S029023, C372S032000

Reexamination Certificate

active

07970025

ABSTRACT:
A method and system for stabilizing a laser to a frequency reference with an adjustable offset. The method locks a sideband signal generated by passing an incoming laser beam through the phase modulator to a frequency reference, and adjusts a carrier frequency relative to the locked sideband signal by changing a phase modulation frequency input to the phase modulator. The sideband signal can be a single sideband (SSB), dual sideband (DSB), or an electronic sideband (ESB) signal. Two separate electro-optic modulators can produce the DSB signal. The two electro-optic modulators can be a broadband modulator and a resonant modulator. With a DSB signal, the method can introduce two sinusoidal phase modulations at the phase modulator. With ESB signals, the method can further drive the optical phase modulator with an electrical signal with nominal frequency Ω1that is phase modulated at a frequency Ω2.

REFERENCES:
patent: 6762869 (2004-07-01), Maleki et al.
patent: 2006/0192970 (2006-08-01), Tiemann
Black, Eric D., “An Introduction to Pound-Drever-Hall laser frequency stabilization”, American Association of Physics Teachers, Jan. 2001, pp. 79-87, vol. 69 No. (1), USA.
Drever, R.W.P. et al., “Laser Phase and Frequency Stabilization Using an Optical Resonator,” Applied Physics B, Springer-Verlag, 1983, pp. 97-105, vol. B No. (31), USA.

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