Silica-Based Planar Lightwave Circuits and Their Applications

MRS Bulletin ◽  
2003 ◽  
Vol 28 (5) ◽  
pp. 365-371 ◽  
Author(s):  
Yoshinori Hibino
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Waveguides ◽  
Wdm Networks ◽  
Planar Lightwave Circuits ◽  
Photonic Networks ◽  
Wavelength Division ◽  
Design Flexibility ◽  
Basic Characteristics ◽  
Planar Lightwave ◽  
Arrayed Waveguide

AbstractThis article reviews the fabrication technologies and optical characteristics of silica-based planar lightwave circuits (PLCs) on Si developed for photonic networks based on wavelength-division multiplexing (WDM). While there have been various planar optical waveguides made with different materials, silica-based PLCs are the most suitable for constructing practical devices because of their excellent design flexibility, stability, and reproducibility. These advantages mainly result from their material characteristics, that is, silica glass is chemically and physically stable. The article also describes the basic characteristics and recent development of arrayed waveguide grating (AWG) multiplexers/demultiplexers as a device application. Since AWGs offer the advantages of low-loss, high-output port counts and mass producibility, they have played a pivotal role in the construction of flexible, large-capacity WDM networks.

Silica-Based Planar Lightwave Circuits

1999 ◽  
Vol 597 ◽  
Author(s):  
Akira Himeno
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Power ◽  
Wdm Networks ◽  
Planar Lightwave Circuits ◽  
Arrayed Waveguide Gratings ◽  
Wavelength Division ◽  
Optical Wavelength ◽  
Power Splitters ◽  
Planar Lightwave ◽  
Arrayed Waveguide

AbstractSilica-based planar lightwave circuits (PLC) provide various important devices for both optical wavelength division multiplexing (WDM) networks and optical access networks. This paper is an overview of recent progress in PLC technology including optical power splitters, arrayed-waveguide gratings, thermo-optic switches, and hybrid integrated PLCs.

8CH AWG Multi/Demultiplexer With MEMS Variable Optical Attenuator

2003 ◽  
Author(s):  
K. Ishikawa ◽  
Q. Yu
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Signal ◽  
Arrayed Waveguide Grating ◽  
Optical Contrast ◽  
Network Systems ◽  
Micro Electro Mechanical Systems ◽  
Wavelength Division ◽  
Power Intensity ◽  
Variable Optical Attenuator ◽  
Arrayed Waveguide

An integrated arrayed waveguide grating multi/demultiplexer (AWG) with a micro-electro-mechanical systems (MEMS) based variable optical attenuator (VOA) is reported. The device consists of an AWG based on silica and a MEMS-VOA chip. The MEMS chip includes 100 μm × 100 μm polysilicon shutter plates coated with gold and electrostatic comb-drive actuators. The MEMS chip is interposed in a trench located in the middle of the I/O waveguides of the AWG to tune the optical transmitting power intensity through the waveguides continuously. The MEMS-VOA shutters have more than a 10 μm displacement. Using those shutters, 30 dB optical contrast from 5 dB at the transmit state to 35 dB at the isolation state is achieved. The obtained attenuation contrast is greater than that of a conventional waveguide-based Mach-Zehnder interferometer VOA and sufficient to adjust and equalize the optical signal power in the wavelength division multiplexing (WDM) network systems.

scholarly journals Receiver Integration with Arrayed Waveguide Gratings toward Multi-Wavelength Data-Centric Communications and Computing

2020 ◽  
Vol 10 (22) ◽  
pp. 8205
Author(s):  
Yoshiyuki Doi ◽  
Toshihide Yoshimatsu ◽  
Yasuhiko Nakanishi ◽  
Satoshi Tsunashima ◽  
Masahiro Nada ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
High Speed ◽  
Baud Rate ◽  
Arrayed Waveguide Gratings ◽  
Wavelength Division ◽  
Integrated Devices ◽  
Multi Wavelength ◽  
Integration Techniques ◽  
Waveguide Gratings ◽  
Arrayed Waveguide

This paper reviews receivers that feature low-loss multimode-output arrayed waveguide gratings (MM-AWGs) for wavelength division multiplexing (WDM) as well as hybrid integration techniques with high-speed throughput of up to 100 Gb/s and beyond. A design of optical coupling between higher-order multimode beams and a photodiode for a flat-top spectral shape is described in detail. The WDM photoreceivers were fabricated with different approaches. A 10-Gb/s photoreceiver was developed for a 1.25-Gb/s baud rate and assembled for eight-channel WDM by mechanical alignment. A receiver with 40-Gb/s throughput was built by using visual alignment for a 10-Gb/s baud rate and four-channel WDM. A 100-Gb/s receiver assembled by active alignment with a four-channel by 25-Gb/s baud rate is the basis for beyond-100 Gb/s and future multi-wavelength integrated devices toward data-centric communications and computing.

scholarly journals WDM Network and Multicasting Protocol Strategies

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Pinar Kirci ◽  
Abdul Halim Zaim
Keyword(s):  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
Multicast Routing ◽  
Wdm Networks ◽  
Just In Time ◽  
Wavelength Division ◽  
Burst Switching ◽  
Internet Users ◽  
Data Transparency ◽  
Optical Burst

Optical technology gains extensive attention and ever increasing improvement because of the huge amount of network traffic caused by the growing number of internet users and their rising demands. However, with wavelength division multiplexing (WDM), it is easier to take the advantage of optical networks and optical burst switching (OBS) and to construct WDM networks with low delay rates and better data transparency these technologies are the best choices. Furthermore, multicasting in WDM is an urgent solution for bandwidth-intensive applications. In the paper, a new multicasting protocol with OBS is proposed. The protocol depends on a leaf initiated structure. The network is composed of source, ingress switches, intermediate switches, edge switches, and client nodes. The performance of the protocol is examined with Just Enough Time (JET) and Just In Time (JIT) reservation protocols. Also, the paper involves most of the recent advances about WDM multicasting in optical networks. WDM multicasting in optical networks is given as three common subtitles: Broadcast and-select networks, wavelength-routed networks, and OBS networks. Also, in the paper, multicast routing protocols are briefly summarized and optical burst switched WDM networks are investigated with the proposed multicast schemes.

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