Effect of bias current in proposed two-stage injection-locked optical OFDM MMF system

In this paper, a two-stage injection locking is proposed in the optical orthogonal frequency division multiplexing (OFDM)-based multimode fiber (MMF) communication system. The primary objective of the proposed technique is to combine the high power output with a low-intensity noise in order to enhance the transmission performance of the system with an extended reach (~ 5000 m). Here, the two-stage injection locking is being reported for the first time in case of 20-Gbps OFDM data signals over MMF links. The technique comprises vertical-cavity surface-emitting lasers under ultra-high injection-locking conditions. A certain optimum threshold point (150 mA) is derived for appropriate biasing of both master and slave lasers under locking conditions. The results demonstrate that the proposed two-stage injection-locked system is significantly effective in achieving better transmission performance (in terms of low bit error rate below 1 × 10 −40 and high Q factor > 19 dB), compared to the other systems, i.e., system without injection locking and with one-stage injection locking.

[1]  Johan S. Gustavsson,et al.  High-Speed, Low-Current-Density 850 nm VCSELs , 2009 .

[2]  Johan S. Gustavsson,et al.  30 GHz bandwidth 850 nm VCSEL with sub-100 fJ/bit energy dissipation at 25–50 Gbit/s , 2015 .

[3]  Jintao Bai,et al.  Bound States of Dissipative Solitons in the Single-Mode Yb-Doped Fiber Laser , 2016, IEEE Photonics Journal.

[4]  Markus Ortsiefer,et al.  High speed (>11 GHz) modulation of BCB-passivated 1.55 spl/mu/m InGaAlAs-InP VCSELs , 2006 .

[5]  An ellipse model for cavity mode behavior of optically injection-locked VCSELs. , 2012, Optics express.

[6]  Peng-Chun Peng,et al.  A 20-km/60-Gb/s Two-Way PON Based on Directly Modulated Two-Stage Injection-Locked 1.55- $\mu\hbox{m}$ VCSEL Transmitters and Negative Dispersion Fibers , 2015, IEEE Photonics Journal.

[7]  Reginaldo B. Nunes,et al.  Experimental validation of a constant-envelope OFDM system for optical direct-detection , 2014 .

[8]  Xiaoxue Zhao,et al.  Greatly enhanced modulation response of injection-locked multimode VCSELs. , 2008, Optics express.

[9]  Lukas Chrostowski,et al.  Injection locking of VCSELs , 2003 .

[10]  A Boletti,et al.  Performance analysis of communication links based on VCSEL and silicon photonics technology for high-capacity data-intensive scenario. , 2015, Optics express.

[11]  W. Hofmann,et al.  40-Gb/s Upstream Transmitters Using Directly Modulated 1.55-$\mu$m VCSEL Array for High-Split-Ratio PONs , 2010, IEEE Photonics Technology Letters.

[12]  C. Chang-Hasnain,et al.  Microwave performance of optically injection-locked VCSELs , 2006, IEEE Transactions on Microwave Theory and Techniques.

[13]  P. Westbergh,et al.  Impact of Photon Lifetime on High-Speed VCSEL Performance , 2011, IEEE Journal of Selected Topics in Quantum Electronics.

[14]  Jing Zhang,et al.  Phase Noise Effects on Phase-Modulated Coherent Optical OFDM , 2016, IEEE Photonics Journal.

[15]  L. Coldren,et al.  Diode Lasers and Photonic Integrated Circuits , 1995 .

[16]  A. N. Al-Omari,et al.  Temperature Dependence of 980-nm Oxide-Confined VCSEL Dynamics , 2008, IEEE Photonics Technology Letters.

[17]  F. Kuppers,et al.  10-Gb/s Direct Modulation of Widely Tunable 1550-nm MEMS VCSEL , 2015, IEEE Journal of Selected Topics in Quantum Electronics.

[18]  Monika Nehra,et al.  Design of Optical I/Q Modulator Using Dual-drive Mach-Zehnder Modulators in Coherent Optical-OFDM System , 2018 .

[19]  Edward I. Ackerman,et al.  Limits on the performance of RF-over-fiber links and their impact on device design , 2006 .

[20]  Meir Orenstein,et al.  Mode-coupling effects on the small-signal modulation of multitransverse-mode vertical-cavity semiconductor lasers , 1999 .

[21]  A. Yariv,et al.  Intermodulation distortion in a directly modulated semiconductor injection laser , 1984 .