Zhang L.,University of Science and Technology of China |
Liu K.,University of Science and Technology of China |
Zhong H.,University of Science and Technology of China |
Zhang J.,University of Science and Technology of China |
And 6 more authors.
Journal of Optics (United Kingdom) | Year: 2015
We present a numerical study of the propagation dynamics of accelerating and decelerating truncated Airy pulses (TAPs) in the anomalous dispersion region of optical fibres, with inclusion of the Raman scattering effects, by analysing their cross-correlation frequency resolved optical gating traces. We identify the differences between the evolution dynamics of a decelerating and accelerating TAP. It is shown that the main lobe of the pulse is capable of shedding solitons, which are delayed due to the Raman effects. For the decelerating pulse, however, the soliton is dragged from the original pulse and never meets the input oscillatory Airy tail due to the deceleration of both the pulse and the soliton. The rest of the decelerating pulse rebuilds a new Airy waveform with a stronger degree of truncation compared with that of the incident pulse. For the accelerating TAP, the soliton collides continuously with the tail of the pulse and thus gains further energy by means of their nonlinear interaction. As a consequence, the remaining pulse cannot develop a new Airy waveform. In addition, under the same conditions, the Raman-induced frequency shift of the accelerating TAP is much larger compared with that of the decelerating one. © 2016 IOP Publishing Ltd.
Cao D.,Advanced Fiber Resources Zhuhai Ltd. |
Cao D.,Tianjin University |
Zhang B.,Sun Yat Sen University |
Wang X.,Advanced Fiber Resources Zhuhai Ltd.
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2014
All-fiber polarized passively mode-locked thulium-doped fiber laser system operating at 2 μm region is presented. Inserting a semiconductor saturable absorber mirror (SESAM) in a Fabry-Perot (F-P) cavity, using master oscillator power amplifier (MOPA) configuration, the laser generated 15.24 ps pulses at repetition rate of 10.24 MHz, with high average power of 1.08 W. The spectrum bandwidth of the 2 μm linearly polarized laser output was measured as 0.3 nm, and extinction ratio of the polarized pulses was 24.17 dB.
Su Y.,Beijing Institute of Technology |
Zhao H.,Beijing Institute of Technology |
Su B.,Beijing Institute of Technology |
Pei X.,Beijing Institute of Technology |
Hu G.,Advanced Fiber Resources Zhuhai Ltd.
Advances in Intelligent and Soft Computing | Year: 2012
In order to provide a necessary basis for the intelligent management and control of network, the design of intelligent optic channel analyzer is developed based on Labview platform and the producer/consumer pattern, which focuses on the problem about surveying correlation parameters of optic signal. The formation and principle of system are introduced at first. Then through analyzing program design patterns, the producer/consumer pattern is adopted and the functions such as data acquisition, data analysis and process, display and so on are implemented by taking advantage of queue function. Finally, its superiority is summarized. The program has characters of good readability, expendability and maintainability. © 2012 Springer-Verlag Berlin Heidelberg.
Xiao Q.,Tianjin University |
Xiao Q.,Advanced Fiber Resources Zhuhai Ltd. |
Wang X.,Advanced Fiber Resources Zhuhai Ltd. |
Fu Q.,Advanced Fiber Resources Zhuhai Ltd. |
And 7 more authors.
Guangxue Xuebao/Acta Optica Sinica | Year: 2015
An optical device based on Michelson interferometer configuration is introduced, which can be used for on-line film thickness measurement. Optical cement is used to splice the glass modules with different lengths and thermal properties, so that the device can make compensation to the environmental temperature variation. Additionally, the double-fiber collimator which is used to input and output the optical signal and the device containing the glass modules are a whole. So the device will not be disturbed by the environment compared to the other interferometers during testing. The stability of the device is tested by an Agilent wavelength measurement system, and the output interference signal shows the excellent performance that the 95% confidential interval of the variation of the free spectral range (FSR) is ± 0.0005 nm in the disturbed environment (while the acquisition resolution of the Agilent system is 0.001 nm). So we believe this device can be used for on-line interference measurement. To demonstrate the feasibility of the automatic measurement of this device in real-time, the thickness of the cover slice is measured, the result is (177.4 ± 0.7) mm, which is comparable with the commercial thickness measurement equipment. ©, 2015, Chinese Optical Society. All right reserved.
Huawei and Advanced Fiber Resources Zhuhai Ltd | Date: 2016-10-26
Embodiments of the present invention disclose a coaxial photodetector comprising an optical port adapter (21), a filtering assembly (22), a connecting tube body (23), a transistor-outline can (TO-CAN) (24) including a photodiode, wherein two ends of the connecting tube body (23) are separately connected to the optical port adapter (21) and the TO-CAN (24), and the filtering assembly (22) is in the connecting tube body (23). The optical port adapter is configured to connect to an optical fiber, and a light beam from the optical fiber is guided to the filtering assembly by the optical port adapter, and is output to the photodiode after filtered by the filtering assembly. A light beam can be filtered, so that the photodiode in the coaxial photodetector has a function of receiving a light beam having a particular wavelength, and an optical loss caused to an optical signal converted between free space and the optical fiber can be reduced.