Abstract
We propose a scheme for phase regeneration of optical binary phase-shift keying (BPSK) data signals based on phase sensitive amplification without active phase locking. A delay interferometer is used to convert a BPSK signal impaired by noise to an amplitude modulated signal followed by cross-phase modulation in a highly nonlinear fiber (HNLF), which transfers the data modulation from the amplitude modulated signal to the phase of a locally generated carrier. By placing the HNLF in a loop, a stable phase relation is maintained relative to a set of counter propagating locally generated phase-locked pumps. As a result, active phase stabilization is avoided. A proof-of-principle experiment is carried out with a dual-pump degenerate phase sensitive amplifier, demonstrating regeneration for a 10-Gb/s non-return-to-zero differential BPSK data signal degraded by a sinusoidal phase-noise tone. Receiver sensitivity improvements of 3.5 dB are achieved at a bit error rate of 10−9. In addition, numerical simulations are performed comparing the idealized regenerator performance in the presence of sinusoidal phase modulation as well as Gaussian phase noise.
© 2015 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription