Mitsubishi Electric Develops 10 Gbps High Output Electroabsorption Modulator -- EAM -- Capable of 80km Transmission and Optical Module FU-653 SEA.TOKYO -- Mitsubishi Electric Corporation (TOKYO:6503) (President and CEO (1) (Chief Executive Officer) The highest individual in command of an organization. Typically the president of the company, the CEO reports to the Chairman of the Board. : Tamotsu Nomakuchi) announced today successful development of an electroabsorption modulator Modulator Any device or circuit by means of which a desired signal is impressed upon a higher-frequency periodic wave known as a carrier. The process is called modulation. The modulator may vary the amplitude, frequency, or phase of the carrier. integrated DFB-LD(1) (EAM-LD(2)) for use as a light source in small optical transceivers for optical fiber telecommunication as well as an optical module FU-653 SEA. This EAM-LD (ML9XX41) achieves 10Gbps(3)-80km (standard single mode fiber) transmission, and the industry's highest average fiber launched power of +3dBm. Samples will begin shipping in April to select customers. (1) Distributed Feedback Laser A type of diode laser that uses diffraction gratings rather than mirrors to create the resonance and oscillation in the cavity. It produces a finer range of wavelengths than a Fabry- Perot cavity. A distributed Bragg reflection laser is a similar technology that uses Bragg gratings. Diode (DFB-LD). Grating is formed in the cavity of the laser diode, which feeds back the light with a specified wavelength. The DFB-LD emits monochromatic monochromatic /mono·chro·mat·ic/ (-kro-mat´ik) 1. existing in or having only one color. 2. pertaining to or affected by monochromatic vision. 3. staining with only one dye at a time. light, which is suitable for the light source in long distance optical communication (2) Electroabsorption modulator (EAM (1) (Enterprise Asset Management) The management and control of the information technology assets within the enterprise. The asset management repository includes a description of the asset as well as contract information pertaining to its acquisition. ): A waveguide waveguide, device that controls the propagation of an electromagnetic wave so that the wave is forced to follow a path defined by the physical structure of the guide. optical modulator based on quantum-confined Stark effect (QCSE QCSE Quantum Confined Stark Effect ) of quantum well structure. Upon applying a reverse bias voltage to EAM, the absorption coefficient absorption coefficient n. 1. The milliliters of a gas at standard temperature and pressure that will saturate 100 milliters of liquid. 2. The amount of light absorbed in 1 atom or in 1 unit of thickness or mass of a given substance. of the quantum well is increased due to shrinkage of its effective band gap (3) Equivalent to transfer of about 1.8 Compact Disks of data in one second
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Price of Sample Start of
sample shipment mass
Model name Summary (ex. tax) date production
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Bit rate: 10Gbps
Max transmission distance:
80km
ML9xx41 Fiber output power: US$500 April 1 August 2005
+3dBm (average fiber launched
power) 10mW(facet output
power)
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Fiber output power: +3dBm
(under modulation)
Chromatic dispersion:
1600ps/nm (equivalent to 80km
FU-653SEA normal dispersion single mode US$1300 April 1 August 2005
fiber)
Butterfly package
GPO Connector
Built-in optical isolator
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Applications Mitsubishi's new ML9xx41 EAM-LD is suitable for small-form-factor optical transceivers (XENPAK(4), XFP XFP 10 Gigabit Small Form Factor Pluggable Module XFP Extra-Fine-Pitch XFP Ten Gigabit Small Form Factor Pluggable (5)) as well as small form factor 300-pin optical transponders, enabling cost-effective 10Gbps optical links for long distance and metropolitan-area applications with high board density. Combining the high-power EAM-LD with a high-sensitivity APD-based optical receiver extends link budget, and enables amplifier-free low-cost 80km optical links with a large loss margin. FU-653SEA is a butterfly type optical module that has ML9xx41 EAM-LD. (4) A specification based on IEEE (Institute of Electrical and Electronics Engineers, New York, www.ieee.org) A membership organization that includes engineers, scientists and students in electronics and allied fields. 802.3ae established for optical receivers that use 10Gbps ethernet (5) A standard specification that is similar to OC-192, ITU-TG.709, 10Gbps fiber channel, etc. Used in efforts to realize a standard for optical receivers, and smaller and less energy consuming than XENPAK Main characteristics --The ML9xx41 EAM-LD utilizes an InGaAsP quantum well (QW) EAM absorption layer that has been optimized so that ultralow frequency chirp(6) is obtained even under high optical output power conditions and at low reverse bias voltages. Positively charged holes, which normally are confined in QWs and deteriorate chirp under high optical output power conditions, are evacuated efficiently at low electric fields. This enables 80km transmission with low optical absorption loss, leading to high optical output power (average fiber launched power of +3dBm). (6) Deviation of instantaneous optical frequency accompanied with optical intensity modulation. Chirp is due to deviation of the real part of the complex refractive index of the EAM absorption layer that is closely related to the modulation of the imaginary part of the complex refractive index, i.e. optical absorption --The ML9xx41 supports "protocol-agnostic" 80km transmission, including SONET/SDH, 10GbE, and ITU-T See ITU. ITU-T - International Telecommunications Union G.709 forward error correction A communications technique that can correct bad data on the receiving end. Before transmission, the data are processed through an algorithm that adds extra bits for error correction. If the transmitted message is received in error, the correction bits are used to repair it. (FEC See forward error correction. FEC - Forward Error Correction ) from 9.95Gbps to 10.7Gbps. --ML9xx41 achieves a high extinction ratio (greater than 10.5dB) at a low driving voltage amplitude of 2.0V. About Mitsubishi Electric With over 80 years of experience in providing reliable, high-quality products to both corporate clients and general consumers all over the world, Mitsubishi Electric Corporation (TOKYO:6503) is a recognized world leader in the manufacture, marketing and sales of electrical and electronic equipment used in information processing and communications, space development and satellite communications, consumer electronics, industrial technology, energy, transportation and building equipment. The company recorded consolidated group sales of 3,309 billion yen (US$ 31.2billion(a)) in the fiscal year ended March 31, 2004. For more information visit http://global.mitsubishielectric.com. (a) At an exchange rate of 106 yen to the US dollar, the rate given by the Tokyo Foreign Exchange Market on March 31, 2004. |
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