Optical signal switching in GaAs waveguide with Bragg grating

2004 ◽  
Author(s):  
I.A. Goncharenko ◽  
A.K. Esman ◽  
V.K. Kuleshov
Keyword(s):  
Optical Signal ◽  
Bragg Grating ◽  
Signal Switching

Development of an Optical Fiber Sensor with a D-shaped Fiber Bragg Grating Integrated in a Loop-mirror Optical Fiber Laser as a High Sensitivity Refractometer

2021 ◽  
Vol 32 ◽  
Author(s):  
Binh Pham Thanh ◽  
Thuy Van Nguyen ◽  
Van Hoi Pham ◽  
Huy Bui ◽  
Thi Hong Cam Hoang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Fiber Laser ◽  
Fiber Bragg Grating ◽  
Limit Of Detection ◽  
Optical Fiber Sensor ◽  
High Sensitivity ◽  
Optical Signal ◽  
Bragg Grating ◽  
Loop Mirror

In this paper, we report a new type of refractometer based on a D-shaped fiber Bragg grating (FBG) integrated in a loop-mirror optical fiber laser. This proposed sensor is used in wavelength interrogation method, in which the D-shaped FBG is applied as a refractive index (RI) sensing probe and a mirror to select mode of laser. The D-shaped FBG is prepared by the removal of a portion of the fiber cladding covering the FBG by means of side-polishing technique. The D-shaped FBG sensing probe integrated in a loop-mirror optical fiber laser with saturated pump technique, the characteristics of sensing signals have been improved to obtain stable intensity, narrower bandwidth and higher optical signal-to-noise ratio compare to normal reflection configuration. The limit of detection (LOD) of this sensor can be achieved to 2.95 x 10-4 RIU in the refractive index (RI) range of 1.42-1.44. Accordingly, we believe that the proposed refractometer has a huge potential for applications in biochemical-sensing technique.

Fiber Bragg Grating Demodulation System Based on Equi-Intensity Cantilever Beam

2010 ◽  
Vol 437 ◽  
pp. 359-363
Author(s):  
Hong Li ◽  
Wei Ping Yan ◽  
Ren Sheng Shen ◽  
Ben Yu Wang
Keyword(s):  
Fiber Bragg Grating ◽  
Cantilever Beam ◽  
Optical Spectrum ◽  
Optical Signal ◽  
Electrical Signal ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Optical Spectrum Analyzer ◽  
Bragg Wavelength ◽  
Scanning Velocity

Optical spectrum analyzer (OSA) can achieve the higher precision and sensitivity, but it is disadvantageous for translating optical signal into electrical signal. A fiber Bragg grating (FBG) matched filtering system based on equi-intensity cantilever beam was presented in this paper. Strain characteristics in different location of cantilever beam were described, and the strain sensitivity of matching grating demodulation based on equi-intensity cantilever beam was deduced mathematically. Strain characteristics of cantilever beam were verified, and the sensing effect of the system was tested. The Bragg wavelength shift range of the demodulating FBG placed on the cantilever beam reached 10 nm, and scanning velocity was 0.125 nm/s. The system could demodulate slow-altered sensing signal accurately and rapidly.

A Mathematical Model of the Reflected Optical Signal with an Inhomogeneous Longitudinal Deformation of an Fiber Bragg Grating

2020 ◽  
Vol 22 (7) ◽  
pp. 361-368
Author(s):  
I.L. Borysenkov ◽  
◽  
A.F. Krutov ◽  
N.P. Kozlov ◽  
G.I. Leonovich ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Fiber Bragg Grating ◽  
Optical Signal ◽  
Bragg Grating ◽  
Longitudinal Deformation

scholarly journals Michelson interferometer system with acoustic optic filter and fiber Bragg grating for reduction of four-wave mixing

2019 ◽  
Vol 15 (7) ◽  
Author(s):  
Fabio Barros De Sousa ◽  
Jorge Everaldo De Oliveira ◽  
Fiterlinge Martins De Sousa ◽  
Marcio Benedito Caldas Costa ◽  
Osmar Tharlles Borges De Oliveira ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Performance Metrics ◽  
Michelson Interferometer ◽  
Single Mode ◽  
Four Wave Mixing ◽  
Optical Signal ◽  
Input Power ◽  
Bragg Grating ◽  
Wave Mixing ◽  
Q Factor

In this paper a simplified design and efficient of a Michelson Interferometer (MI) system is presented, capable of reducing the Four-Wave Mixing (FWM) effects, using fiber Bragg grating and acoustic optic filter (FBG and AOF) with the aid of a highly non-linear photonic crystal fiber (HNL-PCF). The analysis of the MI system based in FBG and AOF was performed according to the effect of fiber length and input power by performance metrics: Optical Spectrum, maximum Quality factor (max. Q-factor), minimum bit error rate (min. BER), eye height, optical signal-to-noise ratio (OSNR) and timing jitter. The numerical simulation results showed that the MI system with FBG and AOF maintained a good signal performance, with Q-factor equal to 33.3 even after 100 km of single mode fiber (SMF) and with downstream signal power by up to 10 dBm.

Nickel dithiolene-PMMA guest-host polymers for all-optical signal switching

1993 ◽  
Author(s):  
Stephen N. Oliver ◽  
Christopher S. Winter ◽  
Robert J. Manning ◽  
James D. Rush ◽  
Callum A. S. Hill ◽  
...  
Keyword(s):  
Optical Signal ◽  
All Optical ◽  
Signal Switching
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