Compact 100-Gb/s DP-QPSK intradyne coherent receiver module employing Si waveguide

Takahashi, Masaru; Matsumoto, Takashi; Watanabe, Shinya; Shiba, Kazuhiro; Kaneko, Taro; Oguro, Masato; Chikuma, T.; Kitamura, N.; Yamazaki, Hiroyuki

doi:10.1109/ecoc.2015.7341910

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…M ERIT of coherent modulation and demodulation techniques make these techniques suitable for communication through optical fibres at high data rates [2]. Dual polarization Quadrature Phase Shift Keying (DP-QPSK) system has been commonly used for high data rates which utilizes diversity in both phase and polarization [3,4]. This coherent technique uses a separate local oscillator (LO) at receiver and also requires a carrier phase recovery (CPR) and compensation module to overcome the effects of laser line-width and frequency offset between the transmitter and receiver lasers.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Polarization Control for Coherent Optical Links with Polarization Multiplexed Carrier

Anghan

Kamran

Gulati

et al. 2019

2019 National Conference on Communications (NCC)

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Self-homodyne systems with polarization multiplexed carrier offer an LO-less coherent receiver with simplified signal processing requirement that can be a good candidate for high-speed short-reach data center interconnects. The practical implementation of these systems is limited by the requirement of polarization control at the receiver end for separating the carrier and the modulated signal. In this paper, effect of polarization impairments in polarization diversity based systems is studied and modeled. A novel and practical adaptive polarization control technique based on optical power feedback from one polarization is proposed for polarization multiplexed carrier based systems and verified through simulation results. The application of the proposed concept is experimentally demonstrated also for a QPSK system with polarization multiplexed carrier.

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Section: Introductionmentioning

confidence: 99%

Adaptive Polarization Control for Coherent Optical Links with Polarization Multiplexed Carrier

Anghan

Kamran

Gulati

et al. 2019

2019 National Conference on Communications (NCC)

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“…With the researchers’ efforts, the silicon optical devices have comparable or even better performance than the commercial devices. For example, modulators and PDs have achieved ultrahigh bandwidth and excellent performance. , By combining different etching depths, many functional passive devices, such as, polarization controllers, − mode controllers, − wavelength division multiplexers/demultiplexers, crossings, − and optical hybrids, , have been reported. Due to the compatibility with CMOS process, the above-mentioned passive devices, modulators and PDs, can be easily integrated in one chip.…”

mentioning

confidence: 99%

“…In the on-chip system, the crossing is the functional device that realizes the different optical circuits go across with each other. Crossings are mainly used in optical hybrid, optical switch, and waveguide routing. The conventional crossing can only support 2 × 2 ports operation, which has less than 0.03 dB insertion loss − and less than −40 dB crosstalk. , As the increase of integration complexity, routing topology will need a large number of crossings.…”

mentioning

confidence: 99%

Ultralow Crosstalk and Loss CMOS Compatible Silicon Waveguide Star-Crossings with Arbitrary Included Angles

Chen¹,

Wang²,

Zhang³

et al. 2018

ACS Photonics

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As the integration level of silicon photonics improves, using a large number of 2 × 2 crossings is seemingly inevitable. However, with the help of a multiports crossing, which has low crosstalk and loss, the number of crossings can be greatly reduced, then the integration density and routing flexibility can be enhanced. Here, we propose and demonstrate the novel 3 × 3, 4 × 4, 5 × 5 and 6 × 6 silicon waveguide star-crossings based on self-imaging. The star-crossings are fabrication compatible with the 180 nm commercial CMOS process. The fabricated devices show ultralow crosstalk and insertion loss. The crosstalk of those crossings are less than −50, −50, −49.2, and −48 dB, respectively, in C-band. The corresponding insertion loss are less than 0.067 dB, 0.075 dB, 0.081 and 0.133 dB, respectively. We also propose the high performance star-crossings with arbitrary angles, which can reduce the difficulty of the waveguide routing and further improve the integration density of photonics IC. The footprint and minimum angle of the proposed star-crossing are also discussed. The crossings have high fabrication tolerance, and will be widely used in the future integrated photonics.

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Compact Low-Power-Consumption 28-Gbaud QPSK/16-QAM Integrated Silicon Photonic/Electronic Coherent Receiver

et al. 2016

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Compact 100-Gb/s DP-QPSK intradyne coherent receiver module employing Si waveguide

Cited by 4 publications

References 6 publications

Adaptive Polarization Control for Coherent Optical Links with Polarization Multiplexed Carrier

Adaptive Polarization Control for Coherent Optical Links with Polarization Multiplexed Carrier

Ultralow Crosstalk and Loss CMOS Compatible Silicon Waveguide Star-Crossings with Arbitrary Included Angles

Compact Low-Power-Consumption 28-Gbaud QPSK/16-QAM Integrated Silicon Photonic/Electronic Coherent Receiver

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