Wavelength-tunable picosecond laser source based on filtering and amplifying broadband dissipative soliton pulse

Laser Physics ◽  
2021 ◽  
Vol 32 (1) ◽  
pp. 015103
Author(s):  
Jing Li ◽  
Chuncan Wang ◽  
Peng Wang ◽  
Pengtao Liu ◽  
Junhao Lan ◽  
...  
Keyword(s):  
Picosecond Laser ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Picosecond Pulse ◽  
Dissipative Soliton ◽  
Laser Source ◽  
Seed Pulse ◽  
Practical Applications ◽  
Wavelength Tunable ◽  
Wavelength Control

Abstract A method for obtaining picosecond pulse sources with continuously tunable central wavelengths is demonstrated numerically and experimentally. A dissipative soliton (DS) mode-locked erbium-doped fiber (EDF) laser based on the nonlinear polarization rotation provides the seed pulse with a flat-top spectral profile and a 55 nm spectral bandwidth. Then it is filtered by a wavelength-tunable super-Gaussian bandpass filter and amplified by two segments of EDFs with different doping concentrations. The output DS pulse from the EDF laser can be compressed from 5.532 ps to 0.291 ps by using a single-mode fiber (SMF-28e), while the pulse energy is about 1.6 nJ. Furthermore, the about 4 ps and 6.84 nJ pulses with continuously tunable central wavelengths ranging from 1535 to 1580 nm can be obtained by amplifying the spectrally filtered pulses. The tunable picosecond pulse source based on the extra-cavity filtering method is very useful for many practical applications because of its flexible wavelength control.

scholarly journals Characterization of small-signal intensity modulation of single-mode fiber grating Fabry-Perot laser source

2012 ◽  
Vol 19 (2) ◽  
pp. 64-70 ◽  
Author(s):  
Hisham Kadhum Hisham ◽  
Ahmad Fauzi Abas ◽  
Ghafour Amouzad Mahdiraji ◽  
Mohd Adzir Mahdi ◽  
Ahmad Shukri Muhammad Noor
Keyword(s):  
Signal Intensity ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Intensity Modulation ◽  
Laser Source ◽  
Fiber Grating ◽  
Small Signal ◽  
Fabry Perot

Development of an Optical Angle Sensor With a Mode-Locked Femtosecond Laser Source for Surface Profile Measurement

2020 ◽  
Author(s):  
Yuki Shimizu ◽  
Shota Takazono ◽  
Yuri Kanda ◽  
Hiraku Matsukuma ◽  
Wei Gao ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Surface Profile ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Laser Source ◽  
Profile Measurement ◽  
Angle Sensor ◽  
Optical Setup ◽  
Optical Modes ◽  
Optical Angle Sensor

Abstract Angle sensors based on the laser autocollimation are often employed to evaluate surface profiles of a target of interest. The authors have developed a femtosecond laser angle sensor, in which a spectrometer or an optical spectrum analyzer with a single-mode fiber is employed as the photodetector for simultaneous capturing of the multiple optical modes. In this paper, the concept of the femtosecond laser angle sensor is applied to evaluate the surface profile of a target of interest. An optical setup is designed in such a way that each mode in the spectrum of the mode-locked femtosecond is utilized as the laser beam to measure the local slope of a measurement target at each different point to evaluate the surface profile. Some basic experiments are carried out by using the developed optical setup with a mode-locked femtosecond laser source to evaluate basic performances of the developed optical setup as an optical angle sensor.

Laser Linewidth Measurements Using Self-Heterodyne Detection with Total-Reflected Delay Line

2012 ◽  
Vol 571 ◽  
pp. 467-470 ◽  
Author(s):  
Jian Li ◽  
Nan Xu ◽  
Jian Wei Li ◽  
Zhi Xin Zhang
Keyword(s):  
Delay Line ◽  
Detection Method ◽  
Tunable Laser ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Heterodyne Detection ◽  
Laser Source ◽  
Laser Communication ◽  
Narrow Linewidth ◽  
Fiber Delay Line

As an important parameter in the laser communication system, the narrow linewidth of tunable laser source (TLS) must be measured accurately. Therefore, the linewidth of a TLS was measured with the delayed self-heterodyne detection method in the present work. The total-reflected delay line was used in the measurement system for make full use of 25km single-mode fiber delay line. The measured linewidth of the 1550 TLS is of 127 kHz, in agreement with the nominal value.

scholarly journals Nonlinearity optimization of dissipative-soliton fiber laser for generation of pulses with 350 kW peak power

2018 ◽  
Vol 6 ◽  
Author(s):  
Han Chi ◽  
Bowen Liu ◽  
Youjian Song ◽  
Minglie Hu ◽  
Lu Chai ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Fiber Length ◽  
Peak Power ◽  
Single Mode ◽  
Output Pulse ◽  
Optimization Method ◽  
Single Mode Fiber ◽  
Dissipative Soliton ◽  
Passive Fiber ◽  
Fiber Segment

We demonstrate a nonlinearity optimization method by altering distribution of passive fibers in a dissipative-soliton mode-locked fiber laser to level up output parameters. In the numerical simulation, we found that the passive fiber segment after gain fiber characterizes the highest average B-integral among fiber segments. By reducing the length of this fiber section and keeping the total passive fiber length as constant, the output pulse energy can be effectively scaled up while maintaining a short dechirped pulse duration, resulting in boosting peak power. With this method, 37-nJ pulses are generated from a dissipative-soliton mode-locked cladding pumped ytterbium-doped single-mode fiber laser in the experiment. The pulse can be dechirped to 66 fs with 350 kW peak power. Moreover, the pulse pedestal is suppressed by a vector-dispersion compressor.

MULTIWAVELENGTH LIGHT SOURCE WITH INTEGRATED DFB LASER ARRAY AND STAR COUPLER FOR WDM LIGHTWAVE COMMUNICATIONS

1994 ◽  
Vol 05 (01) ◽  
pp. 91-109 ◽  
Author(s):  
C.E. ZAH ◽  
J. GAMELIN ◽  
B. PATHAK ◽  
F. FAVIRE ◽  
P.S.D. LIN ◽  
...  
Keyword(s):  
Low Cost ◽  
Single Mode ◽  
Cost Effective ◽  
Single Mode Fiber ◽  
Laser Source ◽  
Photonic Integration ◽  
Laser Array ◽  
Laser Arrays ◽  
Wavelength Division ◽  
Multiwavelength Laser

We discuss the advantages of wavelength-division-multiplexed (WDM) lightwave systems and the need for monolithically integrated multiwavelength laser arrays. For WDM light-wave systems to be cost effective, it is important to reduce the per-wavelength component cost. By photonic integration, the packaging and the control circuitry will be shared among all the wavelengths. In this paper, we review the multiwavelength laser arrays, the array coupling, and the photonic integration approach. We have demonstrated the monolithic integration of a 21-wavelength multi-quantum-well distributed-feedback laser array with a star coupler and optical amplifiers on the same chip. Operating a packaged module under CW operation, we obtained as many as 15 individual wavelengths simultaneously launched from one output port of the star coupler of this integrated chip into one lensed single-mode fiber. We also characterized the thermal and the electrical crosstalk from the neighboring lasers. This integrated chip stands a good chance of being a compact and low-cost multiwavelength laser source for future WDM lightwave systems.

scholarly journals An Off-Axis Differential Method for Improvement of a Femtosecond Laser Differential Chromatic Confocal Probe

2020 ◽  
Vol 10 (20) ◽  
pp. 7235
Author(s):  
Chong Chen ◽  
Yuki Shimizu ◽  
Ryo Sato ◽  
Hiraku Matsukuma ◽  
Wei Gao
Keyword(s):  
Femtosecond Laser ◽  
Focal Plane ◽  
Signal To Noise Ratio ◽  
Single Mode ◽  
Measurement Range ◽  
Single Mode Fiber ◽  
Differential Method ◽  
Laser Source ◽  
Dual Detector ◽  
Chromatic Confocal Probe

This paper presents an off-axis differential method for the improvement of a femtosecond laser differential chromatic confocal probe having a dual-detector configuration. In the proposed off-axis differential method employing a pair of single-mode fiber detectors, a major modification is made to the conventional differential setup in such a way that the fiber detector in the reference detector is located at the focal plane of a collecting lens but with a certain amount of off-axis detector shift, while the fiber detector in the measurement detector is located on the rear focal plane without the off-axis detector shift; this setup is different from the conventional one where the difference between the two confocal detectors is provided by giving a defocus to one of the fiber detectors. The newly proposed off-axis differential method enables the differential chromatic confocal setup to obtain the normalized chromatic confocal output with a better signal-to-noise ratio and approaches a Z-directional measurement range of approximately 46 μm, as well as a measurement resolution of 20 nm, while simplifying the optical alignments in the differential chromatic confocal setup, as well as the signal processing through eliminating the complicated arithmetic operations in the determination of the peak wavelength. Numerical calculations based on a theoretical equation and experiments are carried out to verify the feasibility of the proposed off-axis differential method for the differential chromatic confocal probe with a mode-locked femtosecond laser source.

scholarly journals A Bidirectional Hybrid WDM-OFDM Network for Multiservice Communication Employing Self-Injection Locked Qdash Laser Source Based on Elimination of Rayleigh Backscattering Noise Technique

2021 ◽  
Author(s):  
Paulomi Mandal ◽  
Khaleda Mallick ◽  
Saikat Santra ◽  
Bibhatsu Kuiri ◽  
Bubai Dutta ◽  
...  
Keyword(s):  
Strong Support ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Laser Source ◽  
Error Vector Magnitude ◽  
Promising Alternative ◽  
Rayleigh Backscattering ◽  
Noisy Information ◽  
Data Rates ◽  
Eye Opening

Abstract A scheme for transportation of information with minimum Rayleigh backscattering (RB) noise to the multi-users by employing Qdash laser diode as a source is designed and evaluated. In this paper, employing DPSK, MMW, 16-QAM OFDM, and 32-QAM OFDM techniques, the data rates of 4X10 Gbps are transmitted simultaneously over 50 km single mode fiber (SMF), plus 15 m wireless link, 50 m FSO link, 10 m wireless respectively. Four selective self-injection locked modes of Qdash laser are utilized as optical carriers for downstream (DS) and upstream (US) transmission. To ensure the matter of mitigation of RB noise, which mainly arises due to the transmission of light-wave of same wavelengths in bidirectional transportation, the carrier signals of different wavelength are used for modulation and remodulation in OLT and ONU. Besides being a strong support to increase the tolerance level against RB noise, this architecture is capable to transmit less noisy information wirelessly in RF sensitive areas too. The constancy of the proposed architecture is evaluated by very low power penalty, clear constellation, prominent eye opening, low bit-error-rate and low error vector magnitude. Therefore, the proposed architecture could be promising alternative not only due to the scheme for mitigation of RB noise but also be a potent in the field of applications of the communication world to provide less noisy information to the multi-users (wired/wireless/FSO).

scholarly journals Self-Start Multi-Wavelength Laser Source with Tunable Delay-Line Interferometer and Optical Fiber Reflector for Wireless Communication System

2021 ◽  
Vol 11 (20) ◽  
pp. 9553
Author(s):  
Amare-Mulatie Dehnaw ◽  
Run-Kai Shiu ◽  
Ruei-Bin Chen ◽  
Jyun-Wei Li ◽  
Yibeltal-Chanie Manie ◽  
...  
Keyword(s):  
Transport System ◽  
High Capacity ◽  
Single Mode ◽  
Optical Amplifier ◽  
Single Mode Fiber ◽  
Experimental Result ◽  
Laser Source ◽  
Power Fluctuation ◽  
Noise Interference ◽  
Multi Wavelength

The radio-over-fiber (RoF) technique has gained a lot of interest recently, as the millimeter-wave signals can be generated and delivered in the optical domain with the advantages of low attenuation, high capacity, and being free from electromagnetic noise interference (EMI). In this paper, we propose and experimentally prove a self-start multi-wavelength laser source based on a distributed feedback laser diode (DFB-LD) for the RoF transport system. The self-start multi-wavelength laser source generates stable laser power with less than 0.18 dB power fluctuation and exhibits good stability. In order to estimate the transmission performance, data is externally modulated onto the multi-wavelength by a reflective semiconductor optical amplifier (RSOA) and transmitted through single-mode fiber (SMF). The experimental result proves that the proposed RoF transport system achieves error-free transmission and clear eye diagrams.

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