Effect of direct coupling of microrings on the gain bandwidth of cascade microring Raman amplifier

Bahrampour, Abbas; Bazouband, F.; Nickfarjam, V.

doi:10.1016/j.optcom.2010.03.045

Cited by 7 publications

(4 citation statements)

References 17 publications

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“…Although we have theoretically investigated the structure by Mathematica software as before [53], [54], our results are well consistent with experimental results were explored in [12], [44], [48] for very similar structures to the designed CROW in this study. Also, in [55] the similar CROW was simulated in CST microwave studio and its results do not contradict our data.…”

Section:  ==supporting

confidence: 82%

Improving the Triple Coupled Ring-Resonator Performance as an Optical Filter

Bazouband

Rahimpour

2021

IJOP

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In this paper, a three ringresonator serially coupled is considered as an optical filter. We are going to improve the performance of the designed optical filter by increasing the quality factor and finesse of filtered wavelengths. The first and last rings are coupled to the bus waveguides that carry the input and output fields. The effect of coupling parameters and ring radii on the filtering of operating wavelengths which are between 1545-1550 nm with narrow Free Spectral Range (FSR) less than 0.5 nm is investigated. Using the transfer matrix method, all the rotating and output fields are obtained. FSR, Full Width at Half Maximum (FWHM) and Finesse (F) are evaluated by the wavelength response plots of the output ports obtained in Wolfram Mathematica. The behavior of structure is analyzed by a new approach in order to filter the resonant wavelengths of the transmission channel with higher finesse.

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Section:  ==supporting

confidence: 82%

Improving the Triple Coupled Ring-Resonator Performance as an Optical Filter

Bazouband

Rahimpour

2021

IJOP

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“…Lengthy but straightforward calculation shows that Eqs. (8) and (9) and the definition of the effective gain g i gives the average of the Stokes powerP i as twiceP i 0, P i 0 P f s;i 0 P b s;i 0. The transfer matrix of the ith layer is denoted by m i .…”

Section: Numerical Methods and Resultsmentioning

confidence: 99%

“…The SRS inelastic process causes the initial frequency of an electromagnetic wave that circulates in an optical cavity to downshift toward the Stokes frequencies and generate new electromagnetic frequencies. The optical cavity can be one of the standard resonators, such as Fabry-Perot, microsphere [6], microring resonator [7][8][9], or random cavity [10,11]. The disordered medium in random cavities scatters the electromagnetic field, leading to optical feedback.…”

Section: Introductionmentioning

confidence: 99%

Raman random laser in one-dimensional system

2014

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The probability of occurrence of random cavities' resonance frequency in the Stokes bandwidth of the Raman active medium can cause Raman laser oscillation in the random structures. Due to the small bandwidth of Raman line shape, the probability of the simultaneous appearance of random cavity resonance frequencies in the cascade Stokes line shapes is small. As a result, the cascade Raman laser oscillation effects on the saturation behavior are negligible. The nonlinear transmission matrix method is employed to determine the statistical behavior of a Raman random laser. Our results showed that the statistical behavior depends on the position of the Stokes line shape relative to the center of the stopband and the edge of the passband of the corresponding nondisorder system.

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“…Further reduction of group velocity decreases the pump power or physical length required for nonlinear effects to appear. 18 Using the analytical relations, it was shown that reduced group velocity in PhC waveguides causes larger Raman gain. 2,3 Raman gain has been widely studied in Si-based waveguides, [4][5][6] Si nanowaveguides, 7 Si-chalcogenide slot waveguide, 8 and SiGe-based waveguides.…”

Section: Introductionmentioning

confidence: 99%

New design of ring-based Raman amplifier using optofluidic materials

Seyedfaraji

Ahmadi

2013

Opt. Eng

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We present innovative structures for ring-based Raman amplifier with two separate entrances for the pump and signal. In this way, only the pump is coupled into the ring and the signal passes directly through the path that the amplified pump is propagating inside the ring without a destructive effect on signal pulse. Using engineered nanoholes filled with optofluidic material in the signal and pump paths, we reduce pump and signal group velocity to improve the structure and achieve larger Raman gain. The time evolution and propagation of picosecond signal pulses and dispersion inside the device are analyzed. Maxwell equations are solved using finite difference time-domain method considering optical nonlinear parameters like two photon absorption, free-carrier absorption, and Kerr effect. Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 09/18/2013 Terms of Use: http://spiedl.org/terms Optical Engineering 097103-3 September 2013/Vol. 52(9) Seyedfaraji and Ahmadi: New design of ring-based Raman amplifier using optofluidic materials Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 09/18/2013 Terms of Use: http://spiedl.org/terms

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Effect of direct coupling of microrings on the gain bandwidth of cascade microring Raman amplifier

Cited by 7 publications

References 17 publications

Improving the Triple Coupled Ring-Resonator Performance as an Optical Filter

Improving the Triple Coupled Ring-Resonator Performance as an Optical Filter

Raman random laser in one-dimensional system

New design of ring-based Raman amplifier using optofluidic materials

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