Impact of finite frequency deviation on the performance of dual-filter heterodyne FSK lightwave systems

Ozan K. Tonguz; Okan M. Tanrikulu; Leonid G. Kazovsky

doi:10.1117/12.139331

17 December 1992 Impact of finite frequency deviation on the performance of dual-filter heterodyne FSK lightwave systems

Ozan K. Tonguz, Okan M. Tanrikulu, Leonid G. Kazovsky

Author Affiliations +

Proceedings Volume 1787, Multigigabit Fiber Communications; (1992) https://doi.org/10.1117/12.139331
Event: Fibers '92, 1992, Boston, MA, United States

Abstract

A detailed theoretical analysis is given for the impact of finite frequency deviation on the sensitivity of dual-filter heterodyne frequency shift keying (FSK) lightwave systems. Our analysis provides closed-form signal-to-noise ratio (SNR) results for estimating the bit-error- ratio (BER) performance of the system. These closed-form results provide an insight into the impact of finite frequency deviation 2(Delta) f_d, laser linewidth (Delta) (nu) , bit rate R_b, and IF filter bandwidths on the system performance. Simulation results indicate that the accuracy of the approximate theory presented in this paper is within 1 dB for linewidths up to 22% when BER equals 10^-9. It is shown that there is a well-defined relationship between the choice of frequency deviation and the tolerable amount of laser phase noise. When there is no phase noise, a frequency deviation of 2(Delta) f_d equals 0.72 R_b is sufficient for 1 dB sensitivity penalty with respect to infinite frequency deviation case; whereas for a linewidth of (Delta) (nu) equals 0.50 R_b the required frequency deviation increases to 2(Delta) f_d equals 3.42 R_b for the same sensitivity penalty. The sensitivity degradation can be very severe for a fixed linewidth as the frequency deviation gets smaller: for a linewidth of 20% the sensitivity penalty is only 0.54 dB when the frequency deviation is infinite whereas it is 3.48 dB when the frequency deviation is 2(Delta) f_d equals R_b.

Citation Download Citation

Ozan K. Tonguz, Okan M. Tanrikulu, and Leonid G. Kazovsky "Impact of finite frequency deviation on the performance of dual-filter heterodyne FSK lightwave systems", Proc. SPIE 1787, Multigigabit Fiber Communications, (17 December 1992); https://doi.org/10.1117/12.139331

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available