A5031409392- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Advanced Fiber Optic Sensors
- Photonic Crystal and Fiber Optics
- Optical Network Technologies
- Advanced Photonic Communication Systems
- Laser-Matter Interactions and Applications
- Advanced Optical Sensing Technologies
- Photorefractive and Nonlinear Optics
- Semiconductor Lasers and Optical Devices
- Solid State Laser Technologies
- Diamond and Carbon-based Materials Research
- 2D Materials and Applications
- Mechanical and Optical Resonators
- Neural Networks and Reservoir Computing
- Advanced Frequency and Time Standards
- Photonic Crystals and Applications
- Cancer Treatment and Pharmacology
- Optical Coherence Tomography Applications
- Nonlinear Optical Materials Studies
- Nonlinear Photonic Systems
- Advanced Fluorescence Microscopy Techniques
- Spectroscopy and Laser Applications
- Perovskite Materials and Applications
- Optical Wireless Communication Technologies
Shanghai Jiao Tong University
2016-2025
Zhejiang Lab
2022
China Telecom (China)
2022
China Telecom
2022
Jiangsu University
2020
Nanyang Technological University
2010-2014
Xi’an University
2013
China University of Geosciences
2010
Axcelis Technologies (United States)
2006
Zhongyuan University of Technology
2004
In this paper, we report 4 different saturable absorbers based on transition metal dichalcogenides (MoS(2), MoSe(2), WS(2), WSe(2)) and utilize them to Q-switch a ring-cavity fiber laser with identical cavity configuration. It is found that MoSe(2) exhibits highest modulation depth similar preparation process among four absorbers. Q-switching operation performance compared from the aspects of RF spectrum, optical repetition rate pulse duration. WS(2) Q-switched generates most stable trains...
Two-dimensional (2D) nanomaterials, especially the transition metal sulfide semiconductors, have drawn great interests due to their potential applications in viable photonic and optoelectronic devices, such as saturable absorbers (SAs) optical switches, etc.In this work, tungsten disulfide (WS 2 ) based SA for ultrafast was demonstrated.WS nanosheets were prepared using liquid-phase exfoliation method embedded polyvinyl alcohol (PVA) thin film practical usage.Saturable absorption observed WS...
Topological insulators are phases of matter qualitatively distinct from conventional insulators. Researchers use a microwave network analog to switch between topologically nontrivial and trivial states.
As light cannot be stopped or directly stored in any media, optical delay lines are usually used to temporally trap the signals. We report a wide-range continuously tunable line chip consisting of ring resonator array and Mach–Zehnder interferometer (MZI) switch on 60-nm-thick silicon waveguide platform. The provides continuous tuning more than 10 ps with push–pull differential method. MZI switchable digitally programmable resolution upon reconfiguration switches establish different routing...
Liquid-phase exfoliated 2D material multilayer MoS2 is transferred onto a gold mirror and its saturable absorption at the 2 µm wavelength region experimentally observed. This absorber has modulation depth of 13.6% saturation intensity 23.1 MW cm−2. integrated into linear Tm3+ fiber laser cavity, stable fundamental-frequency mode-locking operation realized with pulse energy 15.5 nJ, width ~843 ps, repetition rate 9.67 MHz. The spectral ~17.3 nm center 1905 nm. first presence sheets in...
We report on the passive-mode-locking operation of a fiber laser with fundamental repetition rate 463 MHz based molybdenum disulfide (MoS2) saturable absorber (SA). By embedding MoS2 into polyvinyl alcohol (PVA) thin film, MoS2-PVA SA was prepared modulation depth 2.7% and saturation intensity 137 MW/cm2. The mode-locked laser-employed achieved center wavelength 1556.3 nm, 3-dB bandwidth 6.1 output power 5.9 mW, an extinction ratio up to 97 dB in RF spectrum. demonstration mode-locking high...
Optical phase shifters and switches play an important role for various optical applications including signal processing, sensing communication. In this paper, we demonstrate a fiber all shifter using few-layer 2D material tungsten disulfide (WS2) deposited on tapered fiber. WS2 absorbs injected 980 nm pump (control light) generates heat which changes the refractive index of due to thermo-optic effect achieves maximum shift 6.1{\pi} near 1550 nm. The device has loss 3.7 dB. By constructing...
Abstract Low phase noise mode-locked fiber laser finds important applications in telecommunication, ultrafast sciences, material science, and biology, etc. In this paper, two types of carbon nano-materials, i.e. single-wall nanotube (SWNT) graphene oxide (GO), are investigated as efficient saturable absorbers (SAs) to achieve low lasers. Various properties these wall-paper SAs, such intensity, optical absorption degree purity, found be key factors determining the performance pulses....
Elementary tellurium is currently of great interest as an element with potential promise in nano-technology applications because the recent discovery regarding its three two-dimensional phases and existence Weyl nodes around Femi level. Here, we report on unique nano-photonic properties elemental particles [Te(0)], harvest from a culture tellurium-oxyanion respiring bacteria. The bacterially-formed nano-crystals prove effective photonic tested compared to chemically-formed nano-materials,...
Erbium-doped lithium niobate on insulator (Er:LNOI) has attracted enormous interest as it provides gain and enables integrated amplifiers lasers the (LNOI) platform. We demonstrate a highly efficient waveguide amplifier Er:LNOI. The 2.58-cm long can achieve 27.94 dB signal enhancement, 16.0 internal net (6.20 dB/cm), −8.84 dBm saturation power, 4.59 dB/mW power conversion efficiency, 4.49 noise figure at 1531.6 nm. Besides, thorough investigation pumping wavelength, scheme, output have been...
Erbium-doped lithium niobate on insulator (Er:LNOI) is a promising platform for photonic integrated circuits as it adds gain to the LNOI system and enables on-chip lasers amplifiers. A challenge Er:LNOI laser increase its output power while maintaining single-frequency single (-transverse)-mode operation. In this work, we demonstrate that single-mode operation can be achieved even in multi-mode microring by introducing mode-dependent loss competition. with free spectral range of 192 GHz,...
The developing advances of microresonator-based Kerr cavity solitons have enabled versatile applications ranging from communication, signal processing to high-precision measurements. Resonator dispersion is the key factor determining comb dynamics. Near zero group-velocity-dispersion (GVD) regime, low-noise and broadband microcomb sources are achievable, which crucial application soliton. When GVD almost vanished, higher-order can significantly affect Although many studies investigated...
Abstract All-optical signal processing avoids the conversion between optical signals and electronic thus has potential to achieve a power efficient photonic system. Micro-scale all-optical devices for light manipulation are key components in have been built on semiconductor platforms (e.g., silicon III-V semiconductors). However, two-photon absorption (TPA) effect free-carrier (FCA) these deteriorate handling limit capability realize complex functions. Instead, nitride (Si 3 N 4 ) provides...
We report a tungsten diselenide (WSe2) polyvinyl alcohol (PVA)-based, saturable absorber and related experiment results of Q-switched fiber laser. WSe2-PVA film is synthesized by liquid phase exfoliation method, its absorption measured via nonlinear transmission experiment. The result shows that has modulation depth 3.5%, which means it potential for generating an ultrafast pulse apply this into ring-cavity erbium-doped laser obtain pulses under appropriate pump power. Our work demonstrates...
We propose an integrated two-dimensional beam-steering device based on on-chip silicon-nitride switch/emitter structure and off-chip lens for light detection ranging (Lidar) application at 1550 nm. In this device, is guided by a 1 × 16 switch to one grating emitter in 4 grating-emitter array. The beam from the collimated steered fixed lens. By changing that emits light, different angle can be achieved. A divergence of 0.06° field view 2.07° 4.12° far are has O(log2N) power consumption N...
We demonstrate a monolithic tunable dual-wavelength laser fabricated on erbium-doped lithium niobate an insulator (Er:LNOI). The enables independent tuning with continuously linear electro-optic (EO)-modulated range of 11.875 GHz at efficiency 0.63 pm/V. Tunable microwave generation within 50 maximum extinction ratio 35 dB is experimentally demonstrated by further exploring the charge accumulation effect in LNOI. design this work paves way for microscale integration devices, presenting...
We have demonstrated an all-normal-dispersion passively mode-locked Yb-doped fiber laser using a graphene oxide/polyvinyl alcohol (GO–PVA) saturable absorber without surfactant, for the first time to best of our knowledge. The experimental results show that pulse duration lasers varies from 191 ps 1.68 ns, while cavity round trip changes 24 458 through variation length. In addition, proposed demonstrates maximum average output power 539 mW with length 94 m, and corresponding single energy...
We present an all-fiber bidirectional passively mode-locked soliton laser with what we believe is a novel cavity configuration. Using four-port circulator, incorporate two different semiconductor saturable absorber mirrors (SESAMs) into the cavity, which enables mode locking. The allows generation of independent countercirculating pulse trains, each individual fundamental repetition rate that can be adjusted by varying SESAM pigtail length. Two trains rates 21.3 and 15.2 MHz are obtained...
In this paper, we review our recent work on thermo-optic all-optical devices based two-dimensional (2D) materials. The unique properties of 2D materials enable fast and highly efficient control light. A few are demonstrated various mechanisms. Both fiber integrated will be shown.
We demonstrate nine-line optical frequency comb (OFC) and sinc-shaped Nyquist pulse generation based on two cascaded silicon Mach-Zehnder modulators. The OFC has a flatness of 1.83 dB, spacing 5 GHz, corresponding pulsewidth ~22 ps. Moreover, multi-wavelength operation repetition rate tunability have also been demonstrated, which indicates the potential our work to generate an on-chip high-speed train demanded in communications microwave photonics applications.
Size dependence of the saturable absorption (SA) property for black phosphorus (BP) was investigated.Three types BP dispersions with different sizes were prepared using liquid phase exfoliation method.By fitting Z-scan data analytical solution propagation equation, SA coefficients NL α and imaginary part third order optical susceptibility(3) Im χ are compared at two specific wavelengths, one above bandgap monolayer 515 nm another between bandgaps bulk 1030 nm.A figure merit (FOM, |Imχ (3) /α...
We demonstrate a method to compensate multi-channel mismatches that intrinsically exist in photonic analog-to-digital converter (ADC) system. This system, nominated time-wavelength interleaved ADC (TWI-PADC), is time-interleaved via wavelength demultiplexing/multiplexing before sampling, demultiplexing channelization, and electronic quantization. Mismatches among multiple channels are estimated frequency domain hardware adjustment used approach the device-limited accuracy. A mismatch...
Abstract Due to its unique trivalent electronic configuration, boron features richer properties as well higher chemical and structural complexities compared with right neighbor carbon. Consequently, over a decade later than the exfoliation of graphene, borophene has just been experimentally demonstrated on certain metal substrates under ultrahigh‐vacuum conditions, which, however, limit wide in‐depth experimental researches. Here, for first time, by employing liquid‐exfoliated nanosheets,...
We present a demonstration of solid-state light detection and ranging (Lidar) at 1550 nm by applying integrated two-dimensional (2D) lens assisted beam-steering (LABS) technology. LABS has O(logN) power consumption for N antennas allows simple control complexity with digital signal input. A time-of-flight coaxial Lidar is demonstrated this The chip both transmit receive the light. 16 scanning angles, 19.5 m distance, 3 cm error. This Letter proves potential application 2D in paves way fully system.