Research on High-Power, High-Speed Laser Modulation and Enlarge Experiment

2014 ◽  
Vol 721 ◽  
pp. 579-582
Author(s):  
Hong Liu ◽  
Wei Da Zhan
Keyword(s):  
Semiconductor Laser ◽  
High Speed ◽  
Control Method ◽  
Automatic Gain Control ◽  
Optical Power ◽  
Fiber Amplifier ◽  
Experimental Result ◽  
Erbium Doped Fiber Amplifier ◽  
Laser Modulation ◽  
Laser Pumping

A laser modulation and amplification system is designed to meet the demand of long-range space optical communication, which uses the high-speed semiconductor laser to integrate electro-absorption (EA) modulator as a seed source. Two optical fiber amplifier technologies are used. The erbium-doped fiber amplifier (EDFA) and single-mode semiconductor laser pumping are used in the first-level; erbium ytterbium co-doped fiber amplifier (EYDFA) and 2-4 multimode fiber laser pumping with good temperature characteristics are used in the second level, and the control method is automatic gain control. The experimental result shows that the modulation rate achieves to 10Gbps, and the output optical power achieves to 5W.

scholarly journals EDFA AND EYCDFA POWER BOOSTER FOR SECURED, HIGH SPEED AND MULTIPLE WAVELENGTH SERVICES IN OPTICAL COMMUNICATION SYSTEMS USING WDM AND QUAD-SINGLE FORWARD AND TRI BACKWARD PUMPING TECHNIQUE

2021 ◽  
Vol 5 (12) ◽  
Author(s):  
S. Semmalar ◽  
S. Malarkkan
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Communication ◽  
Communication Systems ◽  
High Speed ◽  
Optical Power ◽  
Fiber Amplifier ◽  
Signal Power ◽  
Erbium Doped Fiber Amplifier ◽  
Output Optical Power ◽  
Wavelength Division

Proposed the EDFA and EYCDFA power booster (Erbium Doped Fiber Amplifier- Erbium ytterbium co doped fiber amplifier) with quad pumping for high speed and multi wavelength services in an optical communication. The proposed EDFA and EYCDFA power booster with WDM(Wavelength division multiplexing) simulated by dual forward and Backward pumping, Dual-backward pumping, Tri-single forward and dual backward pumping and Quadsingle forward and tri-backward pumping with respect to Pump power and fiber Length. The parameters Input Optical power, Output Optical power, Forward Signal power, Backward Signal power measured and determined the speed of transmission in all types of pumping methods. From that the proposed EDFA- ans EYCDFA power booster with WDM quad pumping is the best suitable for secured high speed optical telecommunication systems. The results shown in Quad pumping Output optical power is maximum 25.2dB and optimum spectral forward Signal power is 30.5dBm and very less spectral optical backward signal power of -25.4dBm with Length 5m

High speed optical switching gain based EDFA model with 30 Gb/s NRZ modulation code in optical systems

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Mahmoud M. A. Eid ◽  
Ahmed Nabih Zaki Rashed ◽  
Keyword(s):  
Optical Fiber ◽  
High Speed ◽  
Optical Switching ◽  
Fiber Amplifier ◽  
Optical Systems ◽  
Power Budget ◽  
Erbium Doped Fiber Amplifier ◽  
Amplifier Model ◽  
Modulation Rate ◽  
Modulation Code

AbstractThis study presents high speed optical switching gain based Erbium doped fiber amplifier model. By using the proposed model the optical fiber loss can be minimized. The system is stabilized with the power budget of 25.875 mW a long 75 km as a length of optical fiber in this study can be verified. The modulation rate of 10 Gb/s can be upgrade up to reach 30 Gb/s. The suitable power for the optical transmitter is −2.440 dBm and NRZ modulation code is verified. The receiver sensitivity can be upgraded with the minimum bit error rate and max Q factor are 1.806 e−009 and 5.899.

An output power stabilized erbium-doped fiber amplifier with automatic gain control

1997 ◽  
Vol 3 (4) ◽  
pp. 1019-1026 ◽  
Author(s):  
N. Takahashi ◽  
T. Hirono ◽  
H. Akashi ◽  
S. Takahashi ◽  
T. Sasaki
Keyword(s):  
Output Power ◽  
Automatic Gain Control ◽  
Gain Control ◽  
Fiber Amplifier ◽  
Erbium Doped Fiber Amplifier ◽  
Erbium Doped

Optical Sensor Using Space-Domain Active Fiber Cavity Ringdown Technique

2021 ◽  
Author(s):  
Wenjia Chen ◽  
Yiwen Ou ◽  
Chunfu Cheng ◽  
Yuanchang Zhu ◽  
Wen Xiao ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Time Domain ◽  
Continuous Wave ◽  
Optical Power ◽  
Fiber Amplifier ◽  
Space Domain ◽  
Erbium Doped Fiber Amplifier ◽  
Baseline Drift ◽  
Cavity Ringdown ◽  
Active Fiber

Abstract A novel active fiber cavity ringdown (FCRD) technique using frequency-shifted interferometry (FSI) is proposed for the first time. Using this scheme, external parameters can be monitored in the space domain by measuring the ringdown distance instead of ringdown time. A bidirectional erbium-doped fiber amplifier (Bi-EDFA) is employed to compensate the inherent cavity loss for achieving higher sensitivity. And two band-pass filters are used to reduce the amplified spontaneous emission (ASE) noise of the Bi-EDFA. Compared with the well-known time-domain active FCRD scheme, our proposed method enables us to avoid using pulsed laser needed in time-domain active FCRD, it uses continuous-wave laser to inject into the fiber cavity and stabilize the optical power in the fiber cavity, which can suppress gain fluctuations of the EDFA and thus improve the detecting precision. Moreover, this novel method enables us to use differential detection method for further reducing the ASE noise, and thus eliminating the baseline drift of ringdown signal. A magnetic field sensor was developed as a proof-of-concept demonstration. The experimental results demonstrate that the proposed sensor with a sensitivity of 0.01537 (1/km·Gs) was achieved. This is the highest magnetic field sensitivity compared to the time-domain active FLRD method. Due to the reduced ASE noise, the stability of the proposed sensing system was also greatly improved.

scholarly journals Realization of a Long-haul Optical Link with Erbium Doped Fiber Amplifier

2018 ◽  
Vol 11 (2) ◽  
pp. 44-49
Author(s):  
Tomáš Huszaník ◽  
Ján Turán ◽  
Ľuboš Ovseník
Keyword(s):  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
Communication Systems ◽  
High Speed ◽  
High Capacity ◽  
Fiber Amplifier ◽  
Optical Signal ◽  
Long Distance ◽  
Erbium Doped Fiber Amplifier ◽  
Erbium Doped

Abstract The need for high capacity and bandwidth in broadband communication systems increased rapidly in a few past years. Optical fiber is now the major transmission medium for fast and reliable communication replacing the old copper-based connections. However, with the deployment of optical networks, number of problems arise. The main problem of optical networks is the amplification in the long-distance transmission. Erbium doped fiber amplifier (EDFA) is the leading technology in the field of optical amplifiers. It uses erbium doped fiber to amplify optical signal. The importance of amplification in optical domain is relevant in long-haul and high-speed transmission systems. In this paper the study of the EDFA is presented. Based on an analytical study, the simulation model of the EDFA is created. The main aim is to determine the optimal parameters of the EDFA for a long-haul 16-channel DWDM (Dense Wavelength Division Multiplexing) system. The performance of the proposed DWDM system is mathematically analyzed using BER (Bit Error Rate) and Q factor.

scholarly journals Performance Evaluation of Different Optical Amplifiers in Spectrum Sliced Free Space Optical Link

2019 ◽  
Vol 41 (1) ◽  
pp. 9-14 ◽  
Author(s):  
Aditi Thakur ◽  
Shaina Nagpal
Keyword(s):  
Wavelength Division Multiplexing ◽  
Free Space ◽  
High Speed ◽  
Optical Amplifiers ◽  
Fiber Amplifier ◽  
Optical Amplifier ◽  
Free Space Optical ◽  
Erbium Doped Fiber Amplifier ◽  
Wavelength Division ◽  
Space Optics

Abstract Free space optics (FSO) is well-competent and premier technology to cater the high speed services in different geographical areas such as hilly areas and inter building network. In this paper, we successfully demonstrated the spectrum sliced wavelength division multiplexed FSO system. In order to make system bandwidth efficient, frequency spacing of 75 GHz is taken among the wavelength division multiplexing (WDM) channels. Carrier spectrum broadening is achieved for spectrum slicing through the nonlinearity called self-phase modulation. Moreover, requirement of multiple laser sources is eliminated. However, in conventional WDM systems, n numbers of lasers are needed to generate n WDM channels. To strengthen the signal in this FSO system, three optical amplifiers are scrutinized such as erbium-doped fiber amplifier (EDFA), semiconductor optical amplifier (SOA) and Raman amplifier in terms of Q-factor and bit error rate (BER). Results revealed that EDFA is best amplifier in proposed SS-WDM-FSO system.

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