Showing 5 results for Micro-Ring
Miss Esmat Rafiee, Dr Farzin Emami, Dr Najmeh Nozhat,
year 20, Issue 0 (1-2014)
Abstract
The proposed system consists of micro-ring resonators (MRRs) with different radii. In this paper, the effects of structural parameters such as gap between the waveguides and the MRRs, width and height of the waveguides and the MRRs and MRR radii on the optical gain are studied. It is shown that by increasing the MRR radius the optical gain decreases and by increasing the width and height of the MRR and the waveguide and the gap, first the optical gain increases and then decreases. The properties of this system are numerically investigated by the finite-difference time-domain (FDTD) method.
Dr. Amin Ghadi, Dr. Saeed Mirzanejhad,
year 21, Issue 0 (3-2015)
Abstract
In this paper we investigated characteristics of a new kind of micro-rings with periodic refractive index that we named it grating micro-ring. Resonance wavelengths, average power conveyed with the grating micro-ring and loss are investigated by finite difference time domain method. The results show that the effect of brag grating in the micro-ring cases to intensify the filed enhancement up to some orders of magnitude at one of the telecommunication resonance wavelengths with respect to the other resonance wavelength of the grating micro-ring. Also the loss of grating micro-ring increases too. This effect can be used to design of integrated photonic devices to omit the other wavelengths.
Yasmin Rahimof, Abbas Dastjani Farahani, Hassan Ghafori Fard, Hamid Reza Habibiyan,
year 26, Issue 0 (2-2020)
Abstract
Nowadays, many researches have been conducted on utilizing optical biosensors but main challenges regarding this type of biosensor are sensitivity and detection limit. In this research design and simulation of optical biosensor based on micro Bezier ring resonator were studied, which includes a ring resonator with a bus waveguide. Finally, the optimum quality factor has been obtained via Taguchi algorithm, in which optimum values of geometrical parameters are calculated while the ring radius is fixed. The best optimized structure is acquired to be Bezier ring resonator with a Bezier number of 0.4, a gap of 250 nm, height of 250 nm and width of 480 nm, which yields a quality factor of 66236, and an FSR of 28.8 nm. This structure has 4.43 times more quality factor in comparison with the other type of Bezier ring resonator.
Mehdi Mohammadrahimzadeh, Fatemeh Bazouband,
year 28, Issue 2 (3-2022)
Abstract
In this study the combination of coupled micro-ring resonators named as CROW is investigated as Raman amplifier. Utilizing the ring resonators in the integrated optical circuits are the appropriate candidates for signal amplification. Because the self-feedback of light inside the rings leads to field enhancement and appearing the nonlinear effects like Raman effect and the desired signal can be amplified by accompanying the appropriate pump. In this paper increasing the bandwidth of amplification by Raman effect is desired. The effect of number of rings and coupling coefficients between them on increasing the amplified bandwidth are explored. The governing equations of fields are written by Matrix method. The frequency spectrum of output channel is studied by Mathematica software to investigate the signal amplification.
Pegah Aivazy Arvanagh, Dr Fatemeh Fatemeh, Dr Gholam-Mohammad Parsanasab, Mohammad Talebi Khoshmehr,
year 28, Issue 2 (3-2022)
Abstract
Here, the experimental performance of optically-pumped polymer micro-ring laser fabricated by the direct writing method of SU-8 is reported. Then the effect size of outside unwanted particles (OUP) is investigated on the sample. It has been shown when the size of OUPs are very small, the amplitude of intensity increase by 67%, and for the OUPs with bigger size, this value decrease by 55% in comparison with no OUP sample. The quality factor of samples without OUP, small, and big OUP respectively has been equal to 1212.68, 2413.32, and 1204.47.
