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Here are all the interesting links I found the last few days:

• JDSU Thank You - United States - Download JDSU’s Reference Guide to Fiber Optic Testing, Volume 1 - Tags: optical optical.test jdsu fiber.optics osa osnr
• DiCon Fiberoptics ~ Directing light with MEMS Technology - DiCon’s 1-CH MEMS ROADM (Reconfigurable Optical Add Drop Multiplexer) is the world’s smallest ROADM. Based on DiCon’s proprietary Thin Film Coating and MEMS technologies, the 1-CH ROADM provides single channel add/drop functionality for tomorrow. - Tags: mems optical roadm tunable filter wss
• Lightwave - Syntune claims world’s smallest 10Gbps tunable transmitter - Syntune AB (search for Syntune), developer of single-chip tunable lasers and transmitters, today announced it is sampling the S4500, which it claims is the world’s first truly monolithic, integrated 10Gbps tunable transmitter. - Tags: optical laser tunable
• YouTube - Al Gore Sings Grease Summer Nights about Global Warming - - Tags: humor al.gore parody
• Erbium Doped Fiber Amplifiers, EDFA, LIDAR, LADAR, CATV, DWDM, FTTH: Nuphoton Technologies, Murrieta, CA - Nuphoton Technologies is one of the pioneering companies in Erbium Doped Fiber Amplifiers (EDFA) and LIDAR sources. - Tags: optical edfa amplifier components
• Clean CSS - CleanCSS is a powerful CSS optimizer and formatter. Basically, it takes your CSS code and makes it cleaner and more concise. - Tags: css tools webdesign optimizer validator web programming reference
• Official Wordpress Plugin Page - Our ever-expanding “extend” section now has a brand-spanking new plugins directory where you can browse, download, rate, and comment on all your favorite plugins. I highly encourage you to go check it out. - Tags: wordpress plugins plugin blog blogging

The University of Paderborn in Germany, CeLight Israel, and Photline in France today announced what they claims is the first real-time electronic tracking of optical polarization changes in a polarization-multiplexed synchronous optical quadrature phase shift keying (search for QPSK) data transmission (Visit the synQPSK Consortium Web site for photographs and detailed measurement results.)

This milestone was achieved in the synQPSK Consortium, funded by the European Commission. The synQPSK modulation scheme quadruples optical fiber capacity and allows for a purely electronic equalization of chromatic and polarization mode dispersions in optical fiber.

In the University of Paderborn, the signal from a standard distributed-feedback laser was impressed with 2.8-Gbit/sec data in two QPSK modulators from Photline to transport in-phase and quadrature data in two orthogonal polarizations at a line rate of only 0.7 Gbits/sec. After transmission over 80 km of fiber, the signals were received in a polarization diversity intradyne coherent optical receiver with two integrated-optical 90 ° hybrids from CeLight and another standard laser as a local oscillator. The detected four photocurrent signals were proportional to in-phase and quadrature components of the received optical field in two polarizations.

After analog-to-digital conversion, the electronic field vector comprising two mixed polarizations was transformed into a polarization-separated one by a matrix multiplication in a field-programmable gate array, say the researchers. Finally, a phase-noise tolerant feed-forward scheme recovered the intermediate frequency carrier in spite of its 2-MHz linewidth, and the four digitized data signals were demodulated synchronously.

Correlation of the four data streams before and behind the decision circuits was performed to dynamically update the sixteen matrix elements. Motorized fiber loops causing endless polarization changes at a speed of up to 50 rad/sec made the received signal highly time-variable. However, a polarization control time constant of 23.5 microseconds rendered this harmless and allowed successful data recovery, note the researchers. The achieved bit error ratio was within the threshold of state-of-the-art forward error correction schemes, they claim.

A summary of the paper can be found here.

While other researchers have reported only offline polarization acquisition, or real-time data transmission without polarization multiplex, this is the first time that all ingredients of an ultimate performance, bandwidth-efficient, robust optical modulation scheme have been combined, say the researchers. Those ingredients include real-time adaptive electronic polarization tracking and synchronous demodulation, transmission of four bit per symbol using QPSK, and polarization division multiplexed standard lasers. With suitable electronics for 40Gbps (10-Gbaud) operation on the horizon, including the possibility of a greater than tenfold polarization tracking speed increase, these properties make synQPSK a very attractive option for the cost-effective growth of optical transmission capacity, say the researchers.

Here are all the interesting links I found today:

• G2P Beta: Using Google to locate MP3s - - Tags: mp3 music google search download free p2p anonymous sharing tools
• ANDevices, Inc. - ANDevices, Inc. is a leading provider of photonic devices for the FTTH, ROADM and long-haul communication markets. Our products are based on a planar lightwave circuit (PLC) platform, which is ideal for integration of multiple optical functions on a singl - Tags: optical roadm multiplexer demultiplexer splitter osa dwdm spectrum.analyzer
• Meriton Networks | Agile Optical Networking - Meriton Networks offers a smart, practical architecture for the NGN optical transport network. Combining intelligent WDM with PBT Ethernet tunnels, network operators can create a converged optical-Ethernet transport network that delivers unparalleled flex - Tags: optical ethernet metro dwdm vendor
• Opnext - Manufacturer of optical communications components - Tags: sfp xfp tosa rosa transceiver
• AFOP - We design, manufacture and market a broad range of high performance fiber optic components and integrated modules for the optical network equipment market. - Tags: optical optical.switch coupler dwdm voa cwdm splitter
• OMRON Optical Communication Devices - Manufactures Low Loss Latching Optical Switches - Tags: optical optical.switch latching components
• MRV Communications, Inc. - MRV provides a completely integrated, secure, end-to-end solution from optical transport, Ethernet aggregation and remote presence management to network management. - Tags: optical ethernet vendor dwdm cross.connect metro MPLS
• PIRELLI - Photonics Products - Pirelli’s provides tunable and pluggable product portfolio of multi-wavelength components, modules and subsystems - Tags: optical dwdm tunable laser
• Princeton Lightwave - Princeton Lightwave (PLI) applies its unique expertise in indium phosphide-based optical semiconductor devices, such as high power lasers and avalanche photodetectors, to design and manufacture advanced optical modules and systems for emerging application - Tags: optical spectrum.analyzer osa dwdm osnr test optical.test
• AXSUN - Axsun’s OMx product family provides highly accurate optical power, frequency and signal-to-noise ratio measurement in the C or L band, and reports the data over a serial RS-232 or dual port RAM interface. - Tags: optical optical.test test osa spectrum.analyzer monitor osnr
• Bookham - Bookham, Inc. designs, manufactures and markets optical components, modules and subsystems used in a broad range of markets, including telecommunications, data communications, aerospace, industrial, consumer optics, semiconductor, sensing, scientific and - Tags: optical transceiver amplifier edfa multiplexer demultiplexer laser test tunable vscel xfp sfp
• Optical Communication Products, Inc. - Optical Communication Products, Inc. is a leading designer and manufacturer of fiber-optic communication components and sub-systems. OCP’s extensive product line of transceivers, transponders, transmitters, receivers, DWDM and CWDM solutions addresses t - Tags: dwdm cwdm optical components transceiver xfp sfp metro long-haul pon gpon san
• Apogee Photonics - Designs, develops, and produces integrated Indium Phosphide solutions for optical transmission systems that exceed the distance-extinction-power (DEP) product of other optical semiconductor technologies. - Tags: optical tosa rosa laser 10gbps 40gbps transceiver
• Civcom - Free-Path family includes Tunable Optical Dispersion Compensator (TODC) which can be either integrated into a transponder or provided as a stand-alone product. - Tags: tunable optical dispersion compensation dwdm 10gbps 40gbps components
• Teraxion - The ClearSpectrum product suite feature two main products: the TDC, an OEM tunable dispersion compensator, and the TDCM, a complete tunable dispersion compensation module that includes an optical circulator and necessary electronics. - Tags: dispersion.compensation optical components tunable
• EXFO Home - Telecom Test and Measurement - Your test expert, from core to access - EXFO delivers the transport/datacom, copper access and optical test technologies required to optimize network performance and triple-play efficiency. - Tags: test optical optical.test dwdm otdr osa bert sonet sdh
• Anritsu Corporation - Information network test & measurement for mobile & internet, RF&Microwave solutions, fibre-optic telecommunications and industrial solutions. - Tags: test sonet sdh optical optical.test 10gbps osa
• Sunrise Telecom - Network Test Equipment - Sunrise Telecom is a global leader in providing service verification equipment for a growing variety of communications environments and technologies. Our broad and integrated portfolio offers leading edge technology and innovation for testing optical, acc - Tags: test network networking sonet sdh 10gbps otn osa bert
• AMCC - AMCC provides the essential building blocks for the processing, moving and storing of information worldwide. AMCC is a global leader in network and embedded PowerPC processing, optical transport and storage solutions. - Tags: semiconductor chips sonet sdh ethernet phy serdes cdr processors cross.connect
• PMC-Sierra - PMC-Sierra is a global provider of broadband communications and storage ICs for access, metro, wireless infrastructure, enterprise and customer premises equipment - Tags: semiconductors chips components sonet sdh wireless 10gbps serdes cdr
• ADVA Optical Networking - Optical Ethernet Networking Equipment - Tags: optical ethernet metro long-haul switch
• Infinera DTN - The Infinera DTN enables valuable transport networking features, including integrated 2.5Gb/s (ODU1) granularity digital switching and grooming for efficient and flexible bandwidth utilization, full digital performance monitoring, integrated digital servi - Tags: dwdm networking optical multiplexer demultiplexer
• Optical Channel Monitors: Features - Aegis DWDM Channel Monitors are available for 3 levels of features and performance: Optical Performance Monitor (OPM), Optical Channel Monitor (OCM), Channel Tilt Monitor (CTM), Tunable Optical Detector (TOD) - Tags: optical osa spectrum.analyzer monitor tunable osnr dwdm
• BaySpec.com - DWDM - The BaySpec’s Chromatica® DWDM multiplexers/demultiplexers are new-generation fiber-optic products for enterprise, metro- and long-haul applications. The devices are designed and manufactured based on BaySpec’s patented technologies, ideally for the syst - Tags: optical multiplexer demultiplexer dwdm
• BaySpec.com - EDFA - BaySpec supplies IntelliGain® and IntensiGain® series erbium-doped fiber amplifiers (EDFAs) designed for OEM integration into applications that require a high gain and a low noise figure. - Tags: edfa optical amplifier
• BaySpec.com - Optical Channel Monitor - BaySpec’s IntelliGuard® Optical Channel Performance Monitor (OCPM) Series represent the next generation of embedded, integrated spectrum analyzers delivering precise measurements and powerful processing capabilities to Dense Wavelength Division Multiplex - Tags: dwdm osa optical spectrum.analyzer monitor
• Proximion - optical layer monitor - WISTOM is available as a standalone or embedded unit and is based on a proprietary, extremely fast scanning filter, containing no moving parts, which is used to scan through the optical C, L or S bands. The filter exhibits superb characteristics; resoluti - Tags: optical osa monitor spectrum.analyzer
• Lightwave - JDSU adds features to T-BERD/MTS-8000 - JDSU has introduced a set of new features for its T-BERD/MTS-8000 fiber optic test instrument. The additions include an in-band optical spectrum analyzer (OSA) that tests network performance; an enhancement for testing Optical Transport Network (OTN) inte - Tags: ethernet sonet otn osa sdh test jdsu
• All about OFDMA - Orthogonal Frequency Division Multiple Access (OFDMA) is a version of OFDM (Orthogonal Frequency Division Multiplexing) modulation that happens to be optimized for multiple users, specifically for cell phones and other mobiles devices. - Tags: ofdm ofdma wireless cellphone wimax wifi cdma mobile modulation
• Sycamore Networks - Optical Networking Equipment Vendor - Tags: optical network switch vendor
• Luxtera Adds Germanium - Luxtera Inc., the world leader in Silicon Photonics, today announced that it is the first company to use a standard SOI-CMOS fabrication process, and by adding pure germanium around optical waveguides, it has developed an integrated long-wavelength photod - Tags: optical cmos components
• Lightwave - CMOS-based transceivers are at hand - Luxtera announced today that it had developed a way to integrate germanium around silicon waveguides to create integrated photodetectors. This advancement represents the last step toward the ability to create an optical transceiver using CMOS processes. - Tags: optical transceiver qsfp sfp xfp 10gbps

DiCon Fiberoptics Inc., manufacturer of fiber-optic components, modules, and test equipment, has announces new MEMS tunable filters in 100- and 50-GHz configurations. DiCon’s MEMS Tunable Filters are the latest additions to its family of reconfigurable network elements, designed to help OEMs and network operators more easily manage their networks at the wavelength level. The tunable filters are based on DiCon’s proprietary MEMS Mirror technology, which the company claims provides low insertion loss and high levels of optical performance, including low PDL, low power consumption, and a compact, cost-effective form factor.

According to DiCon, the tunable filters operate in either the C or L bands and are particularly useful in applications such as ASE noise suppression, wavelength selection, signal tracking, and optical performance monitoring. Moreover, the company confirms that these MEMS tunable filters will form the basis for its Optical Channel Performance Monitor (OCPM) modules, and they can also be integrated into its general purpose test & measurement platform for test automation applications.

The MEMS devices are manufactured in Dicon’s in-house MEMS wafer fab. “By applying our proprietary MEMS approach to tunable filters, Dicon is able to revolutionize the function of wavelength selection by replacing older, bulkier technologies for tunable filters,” explains Dr. Ho-Shang Lee, CEO of DiCon FiberOptics. “Our goal is to provide the necessary optical components and modules to make wavelength management easy for the next generation of dynamically reconfigurable networks.” The new modules will be introduced at OFC 2007 in Anaheim, CA, March 27-29, 2007, in both 100-GHz and 50-GHz configurations.

Visit DiCon Fiberoptics Inc.

Capella provider of wavelength selective switches (WSS) for use in reconfigurable optical add/drop multiplexer (ROADM) applications, today announced the completion of $20 million of equity and debt financing. The round was co-led by Levensohn Venture Partners and Rustic Canyon Partners and included funding from Formative Ventures, as well as participation by existing investors. Square1 Bank provided the banking and debt facilities.

As part of the transaction, Kip Sheeline from Levensohn Venture Partners and Michael Kim from Rustic Canyon Partners will join Capella’s Board of Directors.

Capella says it will use the funds to accelerate shipments to existing customers and to expand its product lines to serve additional markets.

“We are excited to add a new group of top-tier investors who share Capella’s vision,” contends Larry Schwerin, CEO of Capella. “Having their support validates our business model and enables us to meet the high-level of customer demand for our products. It is critical that we take advantage of our momentum domestically and internationally by expanding Capella’s product family and market opportunities and by further scaling our manufacturing operations at Fabrinet,” he says. “This capital also enables us to more effectively support our strategic relationship with Furukawa, and to ensure complete customer satisfaction during a period of rapid growth.”

“Telecom carriers are in the midst of upgrading their networks to support new IP-based services such as faster broadband networks, video, business Ethernet services, and wireless backhaul,” adds Jeffrey Osborne, equity research analyst at CIBC World Markets. “We see wavelength selective switches, such as Capella’s next-generation technology, being very well positioned to capitalize during this period of network transformation.”
Capella will feature a live demonstration of its products at OFC/NFOEC (Booth #3713), to be held March 25-29, 2007, in Anaheim, CA.