Mitigation of Temperature-Induced Dispersion in Optical Fiber on OCDMA Auto-Correlation

We have experimentally investigated the influence of temperature on the optical code-division multiple-access (OCDMA) auto-correlation recovered after transmission in an optical fiber link when exposed to different temperature settings. The OCDMA system uses two-dimensional wavelength-hopping time-spreading (2D-WH/TS) codes based on picosecond multi-wavelength pulses. To the best of our knowledge, we have confirmed for the first time experimentally that a recovered OCDMA auto-correlation will be affected by transmission link temperature changes. Our simulation results are in good agreement with experimental observations. We have also demonstrated that the observed auto-correlation width change can be mitigated by introducing a semiconductor optical amplifier as part of the OCDMA receiver.