A digital coherent receiver employing photonic downconversion is presented and experimentally demonstrated for phase-modulated radio-over-fibre optical links. The receiver is capable of operating at frequencies exceeding the bandwidth of electrical analog-to-digital converter by using photonic downconversion to translate the high-frequency input RF signal to the operating frequency range of the analog-to-digital converter. First, using linear digital demodulation scheme we measure SFDR of the link at microwave frequency of 5 GHz. Thereafter, successful signal demodulation of 50 Mbit/s binary phase shift keying (BPSK) modulated data signal at 5 GHz RF carrier frequency is experimentally demonstrated by using an analog-to-digital converter with only 1 GHz bandwidth. We successfully demonstrate signal demodulation, using the proposed digital coherent receiver with photonic downconversion, after 40 km of transmission through standard single mode fiber.
|Title of host publication||IEEE MTT-S International Microwave Symposium Digest, 2009. MTT '09|
|Publication status||Published - 2009|
|Event||2009 IEEE MTT-S International Microwave Symposium - Boston, United States|
Duration: 7 Jun 2009 → 12 Jun 2009
|Conference||2009 IEEE MTT-S International Microwave Symposium|
|Period||07/06/2009 → 12/06/2009|