Abstract

A nonlinear Mach-Zehnder fiber-optic interferometer as shown in Fig. 1 can be used for light squeezing¹ and amplification.² The mechanism can be viewed either as the Kerr effect,¹ or degenerate four-wave mixing (DFWM).² Using the classical DFWM approach, one finds that if fields of the same frequency with phasors E_s and E_p(′signal′ and ′pump′) are fed into the inputs, then one output phasor is given by where the nonlinear phase shift is given by δφnl= QL |E_SE_p| cosδ, Q is the fiber nonlinear coefficient, L is the fiber length, and δ is the phase difference between the inputs.

© 1991 Optical Society of America