AI Article Synopsis
- - We designed a highly effective demodulator for phase shift keying using a silicon photonic wire waveguide, taking advantage of its birefringence to create a delay line interferometer for different light modes.
- - The study involved calculating the necessary propagation length and waveguide dimensions and conducting measurements to evaluate performance metrics like interference spectrum and error rates.
- - Our experiments showed that a 2.8 cm-long waveguide can achieve a free spectral range of 9.6 GHz and reliable DPSK demodulation at speeds up to 10 Gb/s without errors.
Article Abstract
We experimentally demonstrate a high-quality phase shift keying demodulator based on a silicon photonic wire waveguide. Since the birefringence of the waveguide generates extremely huge differential group delay, an ultra-compact and high-extinction-ratio delay line interferometer is devised in TE and TM modes. We firstly calculated and simulated the requirements for propagation length and waveguide's dimensions. Then, we measured the interference spectrum, eye pattern, bit error rate, and temperature dependence to ascertain its feasibility for DPSK demodulation. For a 2.8 cm-long wire waveguide, a free spectral range of 9.6 GHz and an error-free DPSK demodulation around 10 Gb/s are obtained.
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| http://dx.doi.org/10.1364/OE.20.011037 | DOI Listing |
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