Picosecond gyrolaser

The reduction of the frequency-locking problem is evaluated analytically for an active laser gyroscope in which active coupling of the longitudinal modes in each direction leads to the formation of counterpropagating short pulses. With proper precautions, an important reduction of the lock-in frequency is expected. Numerical calculations confirm this possibility. The use of inexpensive systems based on laser diodes for the pump or perhaps the laser medium is proposed to obtain sensitive devices without mechanical dither.