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In this paper, we demonstrated a ring cavity multiwavelength Brillouin Raman fiber laser exploiting different Fiber Bragg grating reflectivity. The 10 km length of single mode fiber are used as gain medium that has the capability to generate Stimulated Brillouin Scattering and Stimulated Raman Scattering effect. The ring cavity multi-wavelength Brillouin Raman fiber laser is operated in S-band region...
This work is based on the development of LED using a circular chip of ZnSe. Proper analyses of the proposed LED are performed by adding optical transition and nonradiative recombination processes. The voltage applied to the ZnSe LED ranges from 0 V to 3.5 V. The current-voltage characteristic and the flow of current density are obtained. At 2.5 V, the carriers move towards n-contact hence reduces...
Thermal effects and other properties of light emitting diode based on titanium dioxide material were successfully analyzed. Titanium dioxide has been chosen as the selected material due to its special characteristics such as excellent chemical stability, thermal stability and higher band gap energy. The main target of this work was to study the thermal effect and current-voltage characteristics towards...
This paper presents the carried out investigation on nonlinear effects in semiconductor optical amplifier (SOA); in particular two-photon absorption process and its induced free carriers. The simulation results show nonlinear phase shift and the spectral broadening is induced by nonlinear free-carrier effect after propagation through the SOA. The levels of injected carrier density in SOA are varied...
This work focuses on the effectiveness of different metal oxides act as sensing layer in the gas sensor. This is for sensing ethylene (C2H4) gas in fruit ripening detection. The study involved a computational approach, COMSOL Multiphysics whereby the ripeness detector is simulated and characterized. The paper presents a sensitives layer of metal oxides with a thickness of 0.5pm on Lithium Niobate...
This paper presents five signal formats of return to zero (RZ), non-return to zero (NRZ), chirped return to zero (CRZ), soliton and duobinary in a transmission link. All the signals are compared in terms of its original and conversion to carrier suppressed. Long haul of 3880km is used in original transmitter while 770km used for conversion transmitter. The signal converter utilizes the semiconductor...
A homogeneous film of acid functionalized Carbon Nanotubes was deposited on the paper substrate using Langmuir-Blodgett technique. The palladium nanoparticles were dropped on the nanotubes network afterword for device enhancement. The sensitivity of the device towards hydrogen gas was tested at three temperatures; room temperature, 200 °C and 300 °C in atmospheric conditions. The results show that...
The simulation demonstrated an S-shaped multi-wavelength Brillouin-Raman Fiber Laser employing Raman amplifier in the cavity. Raman amplifier- average power model is employed for signals amplification. This configuration is operated in the S-band wavelength region with tuning range between 1460 nm to 1530 nm. A laser signal at 1500 nm with 4 dBm of output power act as the Brillouin pump, while at...
A single wavelength Brillouin fiber laser that utilized Raman amplification in a ring cavity is presented. The laser works in the L-band, which is considered as an extension of the currently used C-band optical communication window. At Brillouin pump wavelength of 1580 nm with a corresponding power of 150 mW, the demonstrated laser has a peak power of 22.5 dBm when the Brillouin gain medium, dispersion...
We demonstrate an L-Band Multi-wavelength Brillouin-Raman fiber laser in a ring cavity utilizing a partially reflective fiber Bragg grating. The partially reflective fiber Bragg grating is utilized to provide feedback into the cavity in opposite direction which is normally accomplished using an S-feedback loop. Using this technique total cavity loss is reduced as lesser optical components are used...
In this paper we demonstrate a single-wavelength Brillouin Fiber laser utilizing ring cavity which operated in the L-band wavelength region. The Brillouin gain medium is provided by 4 km long of Single Mode Fiber. Based on the experimental result, it shows that the maximum output Brillouin power of 9.73 dBm with an average value of 8.5 dBm was obtained as the Brillouin pump power of 16.0 dBm and pump...
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