Laser Phase And Frequency Stabilization

High sensitivity for detection of resonance information is achieved by optical heterodyne detection with sidebands produced by rf phase modulation.

Laser phase and frequency stabilization.

Physical optical and electronic aspects of this discriminator laser frequency stabilization system are considered in detail. 22 573 575 1973. Thus with suitable design the servo loop bandwidth is not limited by the cavity response time. Kowalski and james h.

Since the directly reflected sidebands do not experience a phase shift from the cavity the heterodyne beat between the reflected sidebands and the carrier is sensitive to fast fluctuations of the laser phase allowing. Physical optical and electronic aspects of this discriminator. The phase of the reflected light at the carrier frequency represents a time average of the incident laser phase and frequency. The stabilization of the carrier envelope offset phase or frequency of a mode locked laser ceo stabilization can be based on e g a phase measurement with an f 2f interferometer and feedback via some wedge or tilted mirror in the laser resonator.

The pockels cell actually modulates the laser s phase but the distinction between phase and frequency modulation is irrelevant for the conceptual model. Laser phase and frequency stabilization using an optical resonator article drever1983laserpa title laser phase and frequency stabilization using an optical resonator author r. This instability is primarily due to temperature variations mechanical imperfections and laser gain dynamics 4 which change laser cavity lengths laser driver current and voltage fluctuations atomic transition widths and. Frequency stabilization is needed for high precision because all lasers demonstrate frequency wander at some level.

We show that a high speed domain exists in which the system responds to the phase rather than frequency change of the laser. Ward journal applied physics b year 1983 volume 31 pages 97. These techniques require only minor modifications to the standard pound drever hall locking techniques and have the advantage of not altering the intrinsic stability of the frequency reference. Laser phase and frequency stabilization using an optical resonator r.

Drever university of glasgow and california institute of technology pasadena ca 91125 usa j. Most cavity lengths are sensed using radio frequency phase modulation sidebands added to the main beam by the electro optic modulator via the pound drever hall laser stabilization technique 25.