Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5007567 | Optics & Laser Technology | 2017 | 5 Pages |
Abstract
This paper presents a multi-wavelength laser source with 12Â GHz wavelength spacing based on a single distributed feedback laser. A light wave generated from the distributed feedback laser is fed into a frequency shifter loop consisting of 50:50 coupler, dual-parallel Mach-Zehnder modulator, optical amplifier, optical filter, and polarization controller. The frequency of the input wavelength is shifted and then re-injected into the frequency shifter loop. By re-injecting the shifted wavelengths multiple times, we have generated 84 optical carriers with 12Â GHz wavelength spacing and stable output power. For each channel, two wavelengths are modulated by a wireless data using the phase modulator and transmitted through a 25Â km single mode fiber. In contrast to previously developed schemes, the proposed laser source does not incur DC bias drift problem. Moreover, it is a good candidate for radio-over-fiber systems to support multiple users using a single distributed feedback laser.
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Authors
P.C. Peng, R.K. Shiu, M.A. Bitew, T.L. Chang, C.H. Lai, J.I. Junior,