A5012465691- Photonic and Optical Devices
- Optical Network Technologies
- Advanced Photonic Communication Systems
- Semiconductor Lasers and Optical Devices
- Photonic Crystals and Applications
- Mechanical and Optical Resonators
- Advanced Fiber Laser Technologies
- Advanced Fiber Optic Sensors
- Optical Systems and Laser Technology
- Photorefractive and Nonlinear Optics
- Advanced optical system design
- Advanced Optical Imaging Technologies
- Blind Source Separation Techniques
- Neurobiology and Insect Physiology Research
- NMR spectroscopy and applications
- Advanced MRI Techniques and Applications
Alibaba Group (China)
2021
Fiberhome Technology Group (China)
2016-2020
Wuhan National Laboratory for Optoelectronics
2014-2018
Huazhong University of Science and Technology
2014-2018
Shanghai Jiao Tong University
2013
In this paper, a substrate removing technique in silicon Mach–Zehnder modulator (MZM) is proposed and demonstrated to improve modulation bandwidth. Based on the novel optimized traveling wave electrodes, electrode transmission loss reduced, electro-optical group index 50 Ω impedance matching are improved, simultaneously. A 2 mm long removed MZM with measured extrapolated 3 dB bandwidth of >50 GHz 60 GHz at −8 V bias voltage designed fabricated. Open optical eye diagrams up 90 GBaud/s NRZ...
We demonstrate the optical transmission of an 800 Gbit/s ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="m1"> <mml:mrow> <mml:mn>4</mml:mn> <mml:mo>×</mml:mo> <mml:mn>200</mml:mn> <mml:mtext> </mml:mtext> <mml:mi>Gbit</mml:mi> <mml:mo>/</mml:mo> <mml:mi mathvariant="normal">s</mml:mi> </mml:mrow> </mml:math> ) pulse amplitude modulation-4 (PAM-4) signal and a 480 id="m2"> <mml:mn>120</mml:mn> on–off-keying (OOK) by using high-bandwidth (BW) silicon photonic...
We present the design and experimental demonstration of ultra-high-Q-factor silicon microring resonator based on a multi-mode ridge waveguide. The waveguide is designed to decrease propagation loss improve Q factor. ultra-high factor 1.1×106 experimentally demonstrated, with free spectrum range 0.208 nm. single-mode used in coupling region reduce dimension resonator, bend radius only 20 μm. To precisely control resonance wavelength, small heater implemented tuning efficiency 7.1 pm/mW....
We present an ultra-high speed silicon microring modulator with the Vπ·L of 0.8\ V\cdot cm$ and 3-dB electro-optical bandwidth larger than 67 GHz. Using this high-performance compact modulator, modulations 120 Gbit/s NRZ 200 PAM4 are experimentally demonstrated bit error ratios 1.5e-3 1.08e-3, respectively.
We review the progress on high speed silicon photonic modulators based dispersion plasma effect. present demonstrations of silicon-based 90 Gbaud intensity modulator, 100G CWDM4 transmitter, I-Q modulator and optical frequency comb generator.
A compact external cavity tunable laser based on a silicon hybrid micro-ring resonator is demonstrated. theoretical model also employed for design and analysis of the wavelength tuning performance device. In this model, gain section device simulated by conventional multimode rate equation whereas all rest passive sections are modeled frequency domain method. Experimental results have shown that output power can reach 29 mW, with linewidth less than 150 kHz. The range more 17 nm in C-band 60...
A reconfigurable 4-channel 32Gb/s NRZ, or 2x25GBaud/s PAM4 Si-Photonic transmitter is designed entirely in CMOS, consisting of a CMOS driver wire-bonded to MZ modulators. Measurement results demonstrate optical eye diagrams with > 5dB extinction ratio and <11pJ/bit power efficiency.
A 50-Gb/s four-level pulse-amplitude modulation (PAM4) silicon photonic transmitter is presented, which composed of a 40-nm bulk CMOS driver hybrid integrated with 180-nm silicon-on-insulator (SOI) Mach-Zehnder modulator (MZM). To recover and demodulate PAM4 data into dual-25-Gb/s nonreturn to zero (NRZ) streams for the co-designed MZM digital-analog converter (DAC), reference-less clock recovery (CDR) integrated, achieve high swing speed, made in distributed amplifier (DA), employing...
This article presents a reconfigurable silicon- photonics transmitter (TX) for short-reach optical interconnects. The proposed hybrid-integrated TX combines 65-nm CMOS driver with 180-nm SOI-CMOS silicon-photonic Mach-Zehnder Modulator (MZM). integrated in- segment fractional-UI spaced feed-forward equalizer (FFE) is to support the non-return-zero (NRZ) signaling, electrical- and optical-domain 4-level pulse-amplitude modulation (PAM-4) signaling. employs distributed topology achieve high...
We experimentally demonstrate ultra-high speed optical modulations up to 120 Gbit/s (120 Gbaud NRZ) and 220 (110 PAM4) based on a lithium niobate insulator (LNOI) modulator, which has 3-dB electro-optical bandwidth of 56 GHz the Vπ 2.6 V.
We demonstrate a substrate-removed silicon Mach-Zehnder modulator with the 3-dB electro-optical bandwith beyond 50 GHz. Based on this modulator, 80 Gb/s on-off-keying and Gbaud PAM-4 optical modulations are experimentally achieved without electrical pre-equlization.
A 24-Gb/s PAM-4 signal is generated using a driverless silicon microring modulator, bit error rate of 3.8e-4 achieved after transmission over 150km SSMF, proving that the low cost and power consumption modulators may be candidate in high-capacity modules with advanced modulation.
An optomechanical device that contains a nanomechanical resonator with an ultralow effective mass of 6.42 fg is designed and demonstrated. The femtogram scale embedded in double-slot photonic crystal nanobeam cavity. Optical resonance provides efficient readout the movements. fabricated optically mechanically characterized atmosphere. In measured radio-frequency power spectral density, peak at 3.928 GHz identified to be mechanical mode fg. room-temperature Q-factor 1255, displacement...
We demonstrate an ultra-broadband, low loss and ultra-compact 3dB power splitter. The measured bandwidth of the splitter is 300 nm (limited by optical spectrum analyzer) with 0.28dB.
The exponential growth of cloud computing and artificial intelligence asks for an ever-increasing communication bandwidth within the datacenter. Silicon photonics interconnect provides a promising way to achieve high-integration low-power, which is essential high-density hyper-scale datacenters. Among all electrical-to-optical (E/O) conversion solutions, Mach-Zehnder modulator (MZM) outstands with wide optical high linearity, but suffers from low modulation efficiency. To 4-5dB extinction...
We propose a cost-effective coherent passive optical network (PON) by employing the linear silicon Mach-Zehnder modulator (MZM) with computationally-efficient digital signal processing (DSP). The proposed PON adopts intensity modulation and detection scheme discrete multi-tone (DMT) to achieve both high spectral efficiency (SE) receiver sensitivity. Meanwhile, carrier regeneration (DCR) method is further reduce carrier-to-signal power ratio of modulated DMT based on MZM, which will...
This paper presents a time-division-multiplexing (TDM) scheme for simultaneous wavelength locking of multiple silicon micro-rings by exploiting the speed mismatch between heater and controller. could reduce overall chip size significantly without reducing lock speed. It also avoids cross-channel coupling using least number ADCs DACs. The simplest TDM involving two is experimentally verified board-level circuits. Theoretically, this approach can be scaled to even hundreds micro-rings,...
We present the design of ultra-broad bandwidth 3dB splitter based on silicon slot waveguide. The proposed is simulated as large 600 nm, with insertion loss less than 1dB.
A 32Gb/s-NRZ, 15GBaud/s-PAM4 configurable DFB Laser Diode Driver (LDD) is presented in standard 65nm CMOS. The driver employs a balanced-input, single-ended-output topology to deliver large current output, and integrates tunable pre-emphasis extend the bandwidth. An on-chip active back-termination (ABT) proposed which absorbs loading reflections without sacrificing effective modulation current. Directly wire-bonded laser chip, measurement results show 25.78Gb/s NRZ optical eye-diagram with...
We have experimentally demonstrated an integrated silicon Mach-Zehnder modulator which operates at 1950 nm wavelength range. 50 Gbit/s intensity modulation is achieved with bit error rate below 3.8×10 −3 .
The multi-level modulation of PAM-4 signal using the carrier-depletion based silicon MZI modulator is demonstrated. A 40 Gb/s (4×10 Gb/s) optical transmission over 150 km SSMF achieved with comparable performance commercial LiNbO3 modulator.
Silicon optical modulators, one of the essential building blocks silicon photonics technology, have made rapid progress in last decade and start to show competitive performances when comparing traditional LiNbO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> III-V modulators.
Substrate removing technique is proposed in silicon Mach–Zehnder modulator (MZM) to improve the electro-optic bandwidth. Based on this technique, a MZM with 3 dB electro-optical bandwidth of 55 GHz achieved at 5 V reverse bias for first time. The V[Formula: see text] L 1.3 text]cm an on-chip insertion loss 5.4 dB. substrate reduces electrode transmission loss, achieves group index matching and realizes 50 [Formula: impedance matching, simultaneously. In work, we experimentally demonstrate...
This presentation reviews the recent progress on silicon photonic devices for telecom and datacom applications. Our efforts toward silicon-based 100Gb/s PDM-QPSK CWDM4 transmitters are introduced, based high performanced Mach-Zehnder modulators.
The quantification of Magnetic Resonance Spectroscopy (MRS) signal remains challenging due to the low signal-to-noise ratio (SNR) data. All time-domain methods highly require user interactions, which reduce reproducibility data quantification. goal our work is design a systematic methodology for automated weak in MRS We used Hankel Singular Value Decomposition (HSVD) algorithm estimation step, along with frequency selective preprocessing step using ER-filter improve computational efficiency....