We show that a high speed domain exists in which the system responds to the phase rather than frequency change of the laser.
Laser phase and frequency stabilization.
22 573 575 1973.
We describe a new and highly effective optical frequency discriminator and laser stabilization system based on signals reflected from a stable fabry perot reference interferometer.
Frequency stabilization is needed for high precision because all lasers demonstrate frequency wander at some level.
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.
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.
Thus with suitable design the servo loop bandwidth is not limited by the cavity response time.
Laser phase and frequency stabilization using an optical resonator r.
The pockels cell actually modulates the laser s phase but the distinction between phase and frequency modulation is irrelevant for the conceptual model.
We describe a class of techniques whereby a laser frequency can be stabilized to a fixed optical cavity resonance with an adjustable offset providing a wide tuning range for the central frequency.
High sensitivity for detection of resonance information is achieved by optical heterodyne detection with sidebands produced by rf phase modulation.
Kowalski and james h.
Hall frequency stabilization of a cw dye laser appl.
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.
Drever university of glasgow and california institute of technology pasadena ca 91125 usa j.
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.
Laser phase and frequency stabilization using an optical resonator article drever1983laserpa title laser phase and frequency stabilization using an optical resonator author r.
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.
Physical optical and electronic aspects of this discriminator.
