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Frequency-induced polarization switching and bistability in a 1550?nm VCSEL subject to parallel optical injection
摘要： We experimentally investigate frequency-induced polarization switching (PS) and bistability (PB) characteristics in a 1550 nm vertical-cavity surface-emitting laser (1550 nm VCSEL) subject to parallel optical injection, for which the polarization direction of the injection light is along with the direction of dominant polarization mode in the solitary 1550 nm VCSEL. The results show that, for a 1550 nm VCSEL under parallel optical injection with frequency detuning ?ν (= νinj ? ν0, where νinj is the frequency of injection light and ν0 is the frequency of dominant polarization mode of the solitary 1550 nm VCSEL), type I PS (the dominant polarization mode switches from Y-polarization mode with a shorter wavelength to X-polarization mode with a longer wavelength) and type II PS (the dominant polarization mode switches from X-polarization mode to Y-polarization mode) can be observed through continuously scanning the frequency of injection light. Moreover, the values of ?ν required for generating PSs are dependent on the variation route, namely frequency-induced PB phenomenon occurs. In the region with negative ?ν, there exist two hysteresis loops, whose widths are seriously influenced by the injection power and the biased current.
关键词： 1550 nm vertical-cavity surface-emitting laser (1550 nm VCSEL),Polarization bistability (PB),Parallel optical injection,Polarization switching (PS)
更新于2025-09-09 09:28:46
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[IEEE 2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP) - Auckland, New Zealand (2018.8.5-2018.8.8)] 2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP) - A 120Gbps VCSEL-Based Parallel Optical Module Design
摘要： This paper gives the details of an optical module for 12-channel VCSEL (Vertical-Cavity Surface-Emitting Laser) based design for VSR (Very Short Reach) application. The 12-channel VCSEL driver chip is designed and implemented in a standard 0.18-μm CMOS process. The output stage utilizes C3A (Capacitively Coupled Current Amplifier) structure to speed up the fall time of the laser output waveform. The test results show that the eye diagram of any channel operates at 10 Gbps. Finally, the optical module is packaged with MPO multi-mode connector.
关键词： C3A,laser driver,optical connection,VCSEL
更新于2025-09-09 09:28:46
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[IEEE 2018 IEEE Photonics Conference (IPC) - Reston, VA, USA (2018.9.30-2018.10.4)] 2018 IEEE Photonics Conference (IPC) - 40-Gbit/s 850-nm VCSEL-Based Full-CMOS Optical Link with Power-Data Rate Adaptivity
摘要： An optical link based on directly modulated vertical-cavity surface-emitting laser (VCSEL) at 850-nm wavelength using commercial VCSEL and photodiode operating error-free (BER < 10?12) at 40 Gbit/s is reported. The transmitter is implemented in a 14-nm FinFET CMOS while the receiver (RX) in 28-nm digital bulk-CMOS technologies. This is the fastest 850-nm VCSEL-based single-lane non-return-to-zero optical link with all the analog front-end components fabricated in CMOS. An energy-per-bit of 3.4 pJ/bit is measured at 40 Gbit/s. At the circuits can be decreased adaptively to save power. This results in 2.7 pJ/bit at 20 Gbit/s. A sensitivity of ?1.9 dBm optical modulation amplitude could be measured at the RX for 40 Gbit/s.
关键词： VCSEL,laser driver,CMOS integrated circuits,Optical interconnects,optical receiver
更新于2025-09-04 15:30:14