fast gyro - physicsphysics.wm.edu/~evmik/talks/2014_gyro_wm_qogroup_seminar.pdf · fast gyro...

Fast gyro

Eugeniy E. Mikhailov

The College of William & Mary, USA

SPIE 2014, Febrary 04, 2014

Eugeniy E. Mikhailov (W&M) 4wm in a ring cavity SPIE 2014 1 / 12

Sagnac effect

Eugeniy E. Mikhailov (W&M) 4wm in a ring cavity SPIE 2014 2 / 12

Cavity conditions

Eugeniy E. Mikhailov (W&M) 4wm in a ring cavity SPIE 2014 3 / 12

Atoms in the cavity and Frequency shift derivation

Eugeniy E. Mikhailov (W&M) 4wm in a ring cavity SPIE 2014 4 / 12

Negative dispersion sensitivity enhancement

Eugeniy E. Mikhailov (W&M) 4wm in a ring cavity SPIE 2014 5 / 12

Sensitivity estimate

Eugeniy E. Mikhailov (W&M) 4wm in a ring cavity SPIE 2014 6 / 12

Two level atom dispersion

Eugeniy E. Mikhailov (W&M) 4wm in a ring cavity SPIE 2014 7 / 12

3 coupled levels: EIT

Eugeniy E. Mikhailov (W&M) 4wm in a ring cavity SPIE 2014 8 / 12

N-bar scheme

Eugeniy E. Mikhailov (W&M) 4wm in a ring cavity SPIE 2014 9 / 12

Schematic experimental setup

Eugeniy E. Mikhailov (W&M) 4wm in a ring cavity SPIE 2014 10 / 12

Experimental setup

Eugeniy E. Mikhailov (W&M) 4wm in a ring cavity SPIE 2014 11 / 12

Goals

Short term, almost certain to workdemonstrate EIT in the cavity (almost done)

lock to the probe laser, sweep two-photon detuningshow that we can obtain gain with additional pump lasercavity + gain = laser: see the lasing if we have enough powerplay with gain to adjust dispersion, observe cavity line narrowing

Long term, less likely to just worksee amplification and lasing of counter propagating beam, withoutseeding

fall back scenario: seeding the counter propagation or counterpropagating pump/control

Electronics/laser lockslock cavity to yet another frequency related to the probe to avoidlock drop if we lose gain/transmissionpump laser frequency lockpower stabilizers

Spin the gyroEugeniy E. Mikhailov (W&M) 4wm in a ring cavity SPIE 2014 12 / 12