DESIGN AND CHARACTERIZATION OF MULTIPLE COUPLED MICRORING BASED WAVELENGTH DEMULTIPLEXER IN SILICON–ON–INSULATOR (SOI)

2012 ◽  
Vol 21 (01) ◽  
pp. 1250004 ◽  
Author(s):  
HAZURA HAROON ◽  
SAHBUDIN SHAARI ◽  
P. S. MENON ◽  
B. MARDIANA ◽  
A. R. HANIM ◽  
...  
Keyword(s):  
Free Spectral Range ◽  
Single Mode ◽  
Silicon On Insulator ◽  
Optimized Design ◽  
Third Order ◽  
Wavelength Division ◽  
Wavelength Demultiplexer ◽  
Planar Lightwave ◽  
Difference Time

We report in this paper, an optimized design and characterization of SOI based single mode, four channels wavelength demultiplexer using microrings. The usage of silicon-on-insulator (SOI) allows a wide free spectral range (FSR) for the device that is crucial in developing ultra-compact integrations of planar lightwave circuits (PLCs). The characterizations are done using Finite-Difference Time-Domain (FDTD) mode simulations from RSOFT. Serially cascaded microring arrays up to the third order are presented to study the design trade-off among the FSR, Q-factor and optical losses of the laterally coupled wavelength demultiplexer. The demultiplexer is expected to be working at C-band region of Wavelength Division Multilplexing (WDM) for a wavelength around 1550 nm. Our proposed demultiplexer has low insertion loss (< 0.5 dB) and a crosstalk around 12 ~ 19 dB.

Performance of Optical Wavelength Demultiplexer Based on Silicon-on-Insulator (SOI) Microring Resonators (MRRs)

2011 ◽  
Vol 378-379 ◽  
pp. 549-552
Author(s):  
H. Hazura ◽  
A.R. Hanim ◽  
B. Mardiana ◽  
S. Shaari ◽  
B.Y. Majlis ◽  
...  
Keyword(s):  
Time Domain ◽  
Finite Difference Time Domain ◽  
Free Spectral Range ◽  
Silicon On Insulator ◽  
Microring Resonators ◽  
Third Order ◽  
Optical Wavelength ◽  
Wavelength Demultiplexer ◽  
The Third ◽  
Difference Time

In this paper, we presented the performance analysis of Silicon- on- Insulator (SOI) based, four channels optical wavelength demultiplexer using microrings. The characterizations are done employing Finite- Difference Time- Domain (FDTD) mode simulations from RSOFT. Serially cascaded microring arrays up to the third order are demonstrated to discuss the design issues of the laterally coupled wavelength demultiplexer. Characteristics like the Free Spectral Range (FSR), crosstalk and insertion loss losses are studied.

2x2 Optical Switch Based on Silicon-on-Insulator Microring Resonator

2011 ◽  
Vol 378-379 ◽  
pp. 531-534
Author(s):  
B. Mardiana ◽  
Hanim Abdul Razak ◽  
H. Hazura ◽  
S. Shaari ◽  
P. Susthitha Menon ◽  
...  
Keyword(s):  
Optical Switch ◽  
Free Spectral Range ◽  
Fdtd Method ◽  
Single Mode ◽  
Microring Resonator ◽  
Silicon On Insulator ◽  
Electric Signal ◽  
Compact Size ◽  
Near Future ◽  
Difference Time

In near future, silicon-on-insulator (SOI) microring resonator are expected to be basic components for wavelength filtering and switching due to their compact size and wide free spectral range (FSR). In this paper, a 2X2 optical switch by using active microring resonator is proposed. The switch is consists of second order serially cascaded microring coupled to a pair of waveguide. The ON/OFF state of the design is control by electric signal which will vary the refractive index. The device is design to operate at 1.55µm wavelength. With a 500nm x 200nm rib dimensions, the design is proven to have single mode behaviour. Finite-Difference Time-Domain (FDTD) method simulation by RSOFT software is use to characterize the device performance. The results show that the 2X2 optical switch proposed can be an efficient device to be functioning in WDM application.

scholarly journals Synthesis of Planar Reflective Gratings for Silicon Interconnects

2008 ◽  
Vol 2008 ◽  
pp. 1-8
Author(s):  
Ronald Millett ◽  
Jamie Ramsey ◽  
Przemek Bock ◽  
Julie Nkanta ◽  
Henry Schriemer ◽  
...  
Keyword(s):  
Diffraction Grating ◽  
Free Spectral Range ◽  
Silicon On Insulator ◽  
Dispersion Property ◽  
Wavelength Division ◽  
Optical Crosstalk ◽  
Minimal Thickness ◽  
Planar Silicon ◽  
Polarization Insensitive ◽  
Integrated Receiver

The design and simulations of planar reflective gratings for building optical interconnects in silicon-on-insulator (SOI) were studied for a range of silicon core thicknesses of 0.1 to 10 μm. The verticality of the grating facets has been shown to be the main contributing factor to the cumulative crosstalk in thick silicon cores. The dispersion property of the slab was found to limit the minimal thickness of the core for polarization-insensitive gratings. The effects of polarization-dependent confinement on optical crosstalk were studied. The findings were used to design and simulate a polarization-insensitive 18-channel coarse wavelength division demultiplexer (CWDM) with a free spectral range of over 600 nm. The CWDM demultiplexer uses a 1.7 μm silicon core and combines a shallow-etch tapered rib structure and multimode silicon channels to produce box-like passbands for integrated receiver applications. The diffraction grating was constructed using double astigmatic point design with phase-corrected grating facets to reduce astigmatism. Optical properties of the planar gratings have been simulated using quasivectorial diffraction grating theory. The simulation results confirm that there is high diffraction efficiency and low optical crosstalk over the entire range of operation. Applications of planar silicon gratings to the synthesis of silicon interconnects are discussed.

scholarly journals Effects of Size and Surrounding Medium on Whispering-Gallery-Mode Lasers in Er3+-Doped Silica Microspheres

2021 ◽  
Author(s):  
Thu Trang Hoang ◽  
Van Dai Pham ◽  
Thanh Son Pham ◽  
Xuan Bach Nguyen ◽  
Khai Q. Le ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Surrounding Medium ◽  
Cone Angle ◽  
Single Mode ◽  
Whispering Gallery Mode ◽  
Silica Microspheres ◽  
Whispering Gallery ◽  
Tapered Optical Fiber ◽  
Difference Time

Abstract This work reports the experimental fabrication and characterization of the Er3+-doped silica microspheres (mS) and numerical investigation of the effects of size and surrounding medium on the optical properties of whispering-gallery-mode (WGM) lasers. The heat melting method of two discharge electrodes was used to produce the Er3+-doped silica mSs of diameters up to several tens of micrometers. The 125-mm diameter single-mode optical fiber was tapered with a cone angle formed by chemical etching in hydrofluoric acid (HF) solutions. It was used to produce the mSs and couple the pumped laser into mS surface as well was coupled out the lasing emission. The WGM lasers at telecom regime of ~1520-1570 nm were characterized in both clockwise (CW) and counterclockwise (CCW) propagation directions. By adjusting the coupling gap between the tapered optical fiber and the mS surface, the selectivity of the multi- or single-emitted modes of the mS laser was achieved. We performed finite-difference time-domain (FDTD) simulations to examine the size dependence and analyze the effect of the surrounding medium’s refractive index on the optical characteristics, such as emission wavelength, intensity, as well as the shape of WGM lasing emission. The facile approach and quantitative investigation of this work has attracted much attention from researchers in the micro-photonic field and may be useful in many applications from tunable single-mode lasing sensing to optical micro-devices.

A Multi-Slot-Waveguide-Based Ring Resonator Sensor on Silicon-on-Insulator Platform: Design and Simulation

2013 ◽  
Vol 710 ◽  
pp. 404-407
Author(s):  
Liang Gao ◽  
Guo Hui Yuan ◽  
Xing Li Liu ◽  
Yu Ren Chen
Keyword(s):  
Ring Resonator ◽  
Free Spectral Range ◽  
Fdtd Method ◽  
Silicon On Insulator ◽  
Asymmetric Structure ◽  
Slot Waveguide ◽  
A Value ◽  
Organic Solutions ◽  
Difference Time ◽  
Sensing Characteristics

We design a double slots based on micro-ring resonator on silicon-on-insulator (SOI). An asymmetric structure is considered for the ring waveguide in order to improve the sensor's bending efficiency. Finite-difference time-domain (FDTD) method is used to analyze and optimize this sensor. The optimized size of the sensor is below 25×15μm2. Numerical analysis shows that when the radius of the micro-ring is about 5μm, the sensitivity reaches a value of 708nm/RIU, which is ten times of that of the conventional micro-ring sensor. Quality factor (Qfactor) of 580 and free spectral range (FSR) of 33nm are also obtained. Our analysis also shows that the sensor has good sensing characteristics to different organic solutions.

scholarly journals Simulation and Analysis of Single-Mode Microring Resonators in Lithium Niobate Thin Films

Crystals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 342 ◽  
Author(s):  
Huangpu Han ◽  
Bingxi Xiang ◽  
Jiali Zhang
Keyword(s):  
Thin Films ◽  
Lithium Niobate ◽  
Free Spectral Range ◽  
Single Mode ◽  
Design Parameters ◽  
Microring Resonators ◽  
Cladding Layer ◽  
Resonator Design ◽  
Key Issues ◽  
Difference Time

The single-mode microring resonators on lithium niobate thin films were designed and simulated using 2.5-D variational finite difference time domain mode simulations from Lumerical mode Solutions. The single-mode conditions and the propagation losses of lithium niobate planar waveguide with different SiO2 cladding layer thicknesses were studied and compared systematically. The optimization of design parameters such as radii of microrings and gap sizes between channel and ring waveguides were determined. The key issues affecting the resonator design such as free spectral range and Quality Factor were discussed. The microring resonators had radius R = 20 μm, and their transmission spectrum had been tuned using the electro-optical effect.

A Planar Lightwave Circuit Based on Optical Add-Drop Multiplexer with 16 Tunable Wavelength Channels

2011 ◽  
Vol 216 ◽  
pp. 661-665 ◽  
Author(s):  
Xiao Bo Xing ◽  
Ying Lian Wang
Keyword(s):  
Single Mode ◽  
Grating Period ◽  
Silicon On Insulator ◽  
Etch Depth ◽  
Dispersion Effect ◽  
Channel Spacing ◽  
Bragg Wavelength ◽  
Planar Lightwave Circuit ◽  
Planar Lightwave ◽  
Plasma Dispersion

An electrically controlled optical add-drop multiplexer (OADM) based on silicon on insulator is presented, which possesses 16 tunable add/drop wavelength channel of 100 GHz channel spacing. The OADM is integrated lateral p-i-n diodes with single-mode Mach-Zehnder interferometer filter, which transforms the change of refractive index induced by the plasma dispersion effect into a voltage controlled variation of add/drop wavelength. The 3dB bandwidth of add/drop wavelength is less than 0.8 nm when the etch depth, period, Bragg wavelength and length of Bragg grating are 500 nm, 223 nm, 1548.5 nm and 1000 mm, respectively. When the applied voltage is 1.059~1.2219V, the tunable add/drop wavelength of OADM is between 1547.7 and 1536.5nm. Also, the add/drop wavelength could be controlled precisely by changing the grating period, which can satisfy the requirement of other wavelength range.

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