Abstract
We propose and demonstrate a multiwavelength erbium-doped fiber laser stabilized by four-wave mixing (FWM) in a nonlinear silicon-on-insulator (SOI) waveguide. The optical gain was provided by an erbium-doped fiber amplifier, and the wavelength selectivity was achieved by a Fabry–Pérot comb filter in the ring cavity. The FWM in the SOI waveguide was enhanced by applying a reverse-biased p-i-n diode structure to reduce free-carrier absorption. Making use of the nonlinearity of the SOI waveguide, a multiwavelength laser with six output wavelengths at 0.8 nm spacing was achieved. The power difference among modes was equalized within a range of 1.8 dB. The power fluctuation of each mode was stabilized to <0.65 dB during 20 min observation at room temperature.
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Acknowledgments
The authors thank Institute of Microelectronics, Singapore, for the device fabrication. This work was supported by Hong Kong UGC Special Equipment grant CUHK-SEG01 and CUHK group research grant 3110088.
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Wong, C.Y., Tong, F.W., Cheng, Z. et al. Stabilization of a multiwavelength erbium-doped fiber laser using a nonlinear silicon waveguide. Appl. Phys. B 114, 367–371 (2014). https://doi.org/10.1007/s00340-013-5525-z
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DOI: https://doi.org/10.1007/s00340-013-5525-z