High-power InGaAsP edge-emitting LEDs for single-mode optical communication systems

1985 ◽  
Vol 21 (17) ◽  
pp. 730 ◽  
Author(s):  
R. Olshansky ◽  
D. Fye ◽  
J. Manning ◽  
M. Stern ◽  
E. Meland ◽  
...  
Keyword(s):  
Optical Communication ◽  
High Power ◽  
Communication Systems ◽  
Single Mode ◽  
Optical Communication Systems

scholarly journals Implementation of Multi-Wavelength Source for DWDM-PON Fiber Optical Transmission Systems

2020 ◽  
Vol 57 (4) ◽  
pp. 24-33
Author(s):  
K. Vilcane ◽  
S. Matsenko ◽  
M. Parfjonovs ◽  
R. Murnieks ◽  
M. Aleksejeva ◽  
...  
Keyword(s):  
Optical Communication ◽  
High Power ◽  
System Performance ◽  
Communication Systems ◽  
High Speed ◽  
Nonlinear Optical ◽  
Channel System ◽  
Optical Communication Systems ◽  
Multi Wavelength ◽  
Pump Lasers

AbstractFour-wave mixing (FWM) is one of the well-known nonlinear optical effects (NOE), and it is considered as an adverse impact in fibre optical communication lines. This nonlinear optical effect as a productive one can be used in fibre optical communication systems for various optical processing functions, like wavelength conversion, high-speed time-division multiplexing (TDM), pulse compression, fibre optical parametric amplifiers (FOPA), etc. In most of the fibre optical communication systems, each data transmission channel requires one light source (e.g., laser) as a carrier, which can make these transmission systems expensive. For example, to provide operation of 4-channel dense wavelength-division-multiplexed (DWDM) system four separate lasers at specific operation wavelengths are needed. On the contrary, through the FWM effect, which can be obtained in highly nonlinear optical fibre (HNLF) by using two high-power pump lasers, the generation of new multiple carriers forming the laser array or a multi-wavelength source is possible. Accordingly, within the present research, we investigate the latter approach for FWM light source implementation in DWDM passive optical networks (DWDM-PONs). We analyse up to 16-channel 50 GHz spaced DWDM-PON system with a bitrate of up to 10 Gbit/s per channel, constructed on the basis of two high-power continuous wave (CW) pump lasers. We evaluate the system performance against the number of its channels by changing it from 4 to 16 and in each case find the most optimal HNLF fibre length (for a 4-channel system it is 0.9 km; for an 8-channel system – 1.39 km; and for a 16-channel system – 1.05 km) and laser pump powers (for a 4-channel system it is 20 dBm; for an 8-channel system – 24.1 dBm; and for a 16-channel system – 26.3 dBm). These optimal parameters were found in order to get the highest system performance, respectively, the lowest BER (threshold BER≤10−10), and minimal power fluctuations among FWM generated carriers. The obtained results show that the proposed transmission system can be a promising solution for next-generation high-speed PONs.

Feedback effects in optical communication systems: characteristic curve for single-mode InGaAsP lasers

1992 ◽  
Vol 31 (24) ◽  
pp. 5044 ◽  
Author(s):  
F. Brivio ◽  
C. Reverdito ◽  
G. Sacchi ◽  
G. Chiaretti ◽  
M. Milani
Keyword(s):  
Optical Communication ◽  
Communication Systems ◽  
Characteristic Curve ◽  
Single Mode ◽  
Feedback Effects ◽  
Optical Communication Systems

Fabricating Lensed Fiber Using a Novel Polishing Method

2009 ◽  
Vol 131 (4) ◽  
Author(s):  
Yih-Tun Tseng ◽  
Jhong-Bin Huang ◽  
Wei-Jyun Su
Keyword(s):  
High Power ◽  
Communication Systems ◽  
Coupling Efficiency ◽  
Single Mode ◽  
High Power Laser ◽  
Power Laser ◽  
Long Distance ◽  
Mode Field ◽  
Optical Communication Systems ◽  
Distance Communication

In optical communication systems, 980 nm high-power laser modules are applied for long-distance communication amplifiers. Since the mode field of the 980 nm laser diodes is different from single-mode fibers, coupling losses may occur. In order to improve this problem, lensed fibers have been used widely recently, such as lensed fiber employing quadrangular-pyramid-shaped fiber endface (QPSFE). The QPSFE can easily yield any elliptical microlens aspect ratio to match the far field of the high-power laser diode but the fiber endface must be polished and then spliced during present manufacturing process. It is a time-consuming task and the melting depth of the fiber endface is controlled with difficulty. This study develops a novel fiber endface polishing method for manufacturing the lensed fiber employing QPSFE. Using this new method, the coupling efficiency exceeds 70%.

Dispersion Compensating Square Photonic Crystal Fiber for Optical Communication Systems

2009 ◽  
Vol 129 (4) ◽  
pp. 601-607
Author(s):  
Shubi F. Kaijage ◽  
Yoshinori Namihira ◽  
Nguyen H. Hai ◽  
Feroza Begum ◽  
S. M. Abdur Razzak ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Optical Communication ◽  
Communication Systems ◽  
Crystal Fiber ◽  
Optical Communication Systems

Recent Advances in Ultra-High-Speed Waveguide Photodiodes for Optical Communication Systems

2009 ◽  
Vol E92-C (7) ◽  
pp. 922-928 ◽  
Author(s):  
Kikuo MAKITA ◽  
Kazuhiro SHIBA ◽  
Takeshi NAKATA ◽  
Emiko MIZUKI ◽  
Sawaki WATANABE
Keyword(s):  
Optical Communication ◽  
Communication Systems ◽  
High Speed ◽  
Recent Advances ◽  
Ultra High Speed ◽  
Optical Communication Systems

Efficient Adaptive Equalization for Wireless Optical Communication Systems

2019 ◽  
Vol 28 (1) ◽  
pp. 224-231
Author(s):  
Randa S. Hammad ◽  
El_Sayed M. El_Rabaie ◽  
Fathi. E. Abd-El-Samie ◽  
Ibrahim M. El-Dokany
Keyword(s):  
Optical Communication ◽  
Communication Systems ◽  
Adaptive Equalization ◽  
Wireless Optical Communication ◽  
Optical Communication Systems
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