Simplified optical millimeter-wave generation configuration based on frequency octupling

Abstract In this paper, a tunable, wideband, with simple configuration to generate frequency octupled millimeter (mm)-wave signal for radio-over-fiber systems is theoretically analyzed and experimentally demonstrated. The proposed system consists of two cascaded Mach–Zehnder modulators (MZMs). The first one is working at optical carrier suppression modulation that is used for the first-order optical harmonic generation. The second one is dual-parallel MZM which utilized the first-order optical harmonic to generate frequency octupled mm-wave signal. The experiments show that without any filter, a wideband frequency octupled optical mm-wave signals with the frequency varying from 4 to 80 GHz and the undesired sideband suppression ratios of higher than 34 dB can be obtained. The phase noise performance and the transmission performance of the radio-over-fiber downlink system are also demonstrated. The single-sideband phase noise of the generated 80 GHz signal is −88 dBc/Hz at 10 kHz offset. The power penalty is less than 3 dB at the bit error rate of 10 −10 after 50 km single-mode fiber transmission. Furthermore, it is proved to be valid that the proposed scheme is insensitive to the RF signal phase drift and the MZM bias drift, which demonstrates a relatively higher stability.

[1]  P. Shih,et al.  A continuously tunable and filterless optical millimeter-wave generation via frequency octupling. , 2009, Optics express.

[2]  A. Wiberg,et al.  Microwave-photonic frequency multiplication utilizing optical four-wave mixing and fiber Bragg gratings , 2006, Journal of Lightwave Technology.

[3]  T. Sakamoto,et al.  High Extinction Ratio Mach–Zehnder Modulator Applied to a Highly Stable Optical Signal Generator , 2007, IEEE Transactions on Microwave Theory and Techniques.

[4]  Hongwei Chen,et al.  A Photonic Microwave Frequency Quadrupler Using Two Cascaded Intensity Modulators With Repetitious Optical Carrier Suppression , 2007, IEEE Photonics Technology Letters.

[5]  Jianping Yao,et al.  Millimeter-Wave Frequency Tripling Based on Four-Wave Mixing in a Semiconductor Optical Amplifier , 2006, IEEE Photonics Technology Letters.

[6]  A. Nirmalathas,et al.  Millimeter-wave broad-band fiber-wireless system incorporating baseband data transmission over fiber and remote LO delivery , 2000, Journal of Lightwave Technology.

[7]  Hongwei Chen,et al.  Photonic generation of a millimeter-wave signal based on sextuple-frequency multiplication. , 2007, Optics letters.

[8]  Mario Dagenais,et al.  Optical generation of a megahertz-linewidth microwave signal using semiconductor lasers and a discriminator-aided phase-locked loop , 1997 .

[9]  H. Taylor,et al.  Microwave signal generation with injection-locked laser diodes , 1983 .

[10]  Ke Wu,et al.  Frequency sixupler for millimeter-wave over fiber systems. , 2008, Optics express.

[11]  Jianping Yao,et al.  Generation and distribution of a wide-band continuously tunable millimeter-wave signal with an optical external modulation technique , 2005, IEEE Transactions on Microwave Theory and Techniques.

[12]  Lowell L. Scheiner,et al.  Fiber-Optic Communications Technology , 2000 .

[13]  Jianping Yao,et al.  Microwave Generation Based on Optical Domain Microwave Frequency Octupling , 2010, IEEE Photonics Technology Letters.

[14]  Chang-Soo Park,et al.  Photonic Frequency Upconversion by SBS-Based Frequency Tripling , 2007, Journal of Lightwave Technology.

[15]  Alejandro Martínez,et al.  Simultaneous baseband and RF optical modulation scheme for feeding wireless and wireline heterogeneous access networks , 2001 .

[16]  Lin Xu,et al.  Optical mm-Wave Signal Generation by Frequency Quadrupling Using an Optical Modulator and a Silicon Microresonator Filter , 2009, IEEE Photonics Technology Letters.

[17]  Peng-Chun Peng,et al.  Hybrid Optical Access Network Integrating Fiber-to-the-Home and Radio-Over-Fiber Systems , 2007, IEEE Photonics Technology Letters.