Linearized microwave photonic link based on dual-driven Mach–Zehnder modulator

Abstract. A highly linearized microwave photonic link (MPL) based on a dual-drive Mach–Zehnder modulator (DDMZM) is proposed. Eliminating or suppressing these nonlinear distortions is achieved by adjusting the polarization of the light and the frequency of the radio frequency (rf) signal as well as controlling the dc bias voltage of DDMZMs. The proposed technique is verified by the simulation test of two-tone and three-tone. Theoretical analysis and simulation experiments show that under the two-tone condition, when the modulation depth is <0.8, intermodulation distortion (IMD) and even-order harmonic distortion (HD) can be completely eliminated, and third-order HD can be suppressed under the background noise level. Compared with traditional MPL, the spurious free dynamic range of MPL is improved by 11 dB. In addition, in the three-tone test, when the modulation depth is <1, the second-order distortion is completely eliminated and the IMD3 third-order HD are suppressed. The scheme can be used in single octave or multiple octave systems.

[1]  Bahram Jalali,et al.  Digital broadband linearization of optical links. , 2013, Optics letters.

[2]  W. Baechtold,et al.  Reduction of 3rd order intermodulation of a semiconductor laser by an adaptive low-cost predistortion circuit at 1.8 GHz , 1999, 1999 Digest of the LEOS Summer Topical Meetings: Nanostructures and Quantum Dots/WDM Components/VCSELs and Microcavaties/RF Photonics for CATV and HFC Systems (Cat. No.99TH8455).

[3]  Feng Fan,et al.  Linearization of microwave photonic link based on nonlinearity of distributed feedback laser , 2016 .

[4]  Dalma Novak,et al.  Broadband Adaptive Feedforward Photonic Linearization for High Dynamic Range Signal Remoting , 2007, MILCOM 2007 - IEEE Military Communications Conference.

[5]  Wanyi Gu,et al.  Third-order intermodulation distortion elimination of microwave photonics link based on integrated dual-drive dual-parallel Mach-Zehnder modulator. , 2013, Optics letters.

[6]  Xiaoping Zheng,et al.  Highly Linear Radio-Over-Fiber System Incorporating a Single-Drive Dual-Parallel Mach–Zehnder Modulator , 2010, IEEE Photonics Technology Letters.

[7]  P. Faccin,et al.  Analog laser predistortion for multiservice radio-over-fiber systems , 2003 .

[8]  Bai-Ou Guan,et al.  Broadband high dynamic range fiber optic link based on a dual-polarization modulator. , 2019, Optics express.

[9]  Feifei Yin,et al.  Digital suppression of both cross and inter-modulation distortion in multi-carrier RF photonic link with down-conversion. , 2014, Optics express.

[10]  Venkatraman Gopalan,et al.  Domain inversion in LiNbO3 using direct electron-beam writing , 1992 .

[11]  Tao Jin,et al.  Linearization of two cascaded intensity-modulator-based analog photonic link , 2018, Optical Engineering.

[12]  Tao Zhou,et al.  SFDR enhancement in analog photonic links by simultaneous compensation for dispersion and nonlinearity. , 2013, Optics express.

[13]  Qinggui Tan,et al.  A Linearization Analog Photonic Link With High Third-Order Intermodulation Distortion Suppression Based on Dual-Parallel Mach–Zehnder Modulator , 2015, IEEE Photonics Journal.

[14]  Kun Xu,et al.  Digital linearization technique for IMD3 suppression in intensity-modulated analog optical links , 2011, 2011 International Topical Meeting on Microwave Photonics jointly held with the 2011 Asia-Pacific Microwave Photonics Conference.

[15]  Kun Xu,et al.  Advanced DSP technique for dynamic range improvement of a phase-modulation and coherent-detection microwave photonic link , 2013, 2013 IEEE International Topical Meeting on Microwave Photonics (MWP).

[16]  Tetsuya Kawanishi,et al.  Compensation of Third-Order Inter Modulation Distortion by Using Frequency Chirp Modulation for Electro-Optic Modulator , 2018, 2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama).

[17]  Jianping Yao,et al.  Simultaneous even- and third-order distortion suppression in a microwave photonic link based on orthogonal polarization modulation, balanced detection, and optical sideband filtering. , 2016, Optics express.

[18]  K. Williams,et al.  Microwave photonics , 2002 .

[19]  Jeffrey Rodriguez,et al.  Pulsed Sagnac Loop Phase-Modulated Microwave Photonic Link , 2018, IEEE Photonics Technology Letters.

[20]  Wanyi Gu,et al.  Simple digital linearization for phase-modulation photonic downconvertion , 2013, 2013 IEEE Photonics Conference.

[21]  Xingyu Zhang,et al.  Highly Linear Broadband Optical Modulator Based on Electro-Optic Polymer , 2012, IEEE Photonics Journal.