Alcatel Optronics launches continuous wave laser, tunable laser for DWDM systems

Oct. 11, 2001--Alcatel Optronics, a provider of opto-electronic components for telecommunications systems, announced the Alcatel 1935 LMI, a continuous wave laser integrating a wavelength monitoring function. The company also announced a new generation of continuous tunable lasers -- the Alcatel 1935 TLI -- integrating a wavelength monitoring function.

Oct 11th, 2001

Alcatel Optronics (NASDAQ: ALAO), a provider of opto-electronic components for telecommunications systems, announced the Alcatel 1935 LMI, a continuous wave laser integrating a wavelength monitoring function. Associated with an external modulator, this laser module, with a perfectly controlled emitted wavelength, is the ideal component for 2.5 Gbit/s, 10 Gbit/s and 40 Gbit/s long reach and very long reach Dense Wavelength Division Multiplexing (DWDM) transmissions. This high-performance laser module offers gains in terms of DWDM systems' space saving and cost reduction.

WDM transmission networks are becoming more and more dense, and channel spacing is being reduced. Therefore it is necessary to perfectly stabilize the wavelength emitted by the laser, whatever the conditions of use and for the entire life span of transmission systems. The wavelength stabilizing and monitoring functions were until today handled by specific separate components. Alcatel Optronics now offers a solution of an integrated module associating transmission laser and emitted wavelength control.

The Alcatel 1935 LMI laser module covers C and L bands, with output power up to 20 mW. In a 14-pin butterfly standard package, it combines a laser chip, a Fabry-Perrot filter and two photodiodes precisely controlling the optical power and the wavelength emitted into the optical fiber. This integration offers space reduction on electro-optical boards and reduction of optical connections. The standardized module size and pin-out offer complete compatibility with standard continuous WDM lasers. Moreover, the choice of an air-gap Fabry-Perrot filter leads to very high wavelength stability, +/- 1.25 GHz, for an external temperature range from 0°C to 70°C.

The company also announced a new generation of continuous tunable lasers -- the Alcatel 1935 TLI -- integrating a wavelength monitoring function. Addressing eight different wavelengths with narrower channel spacing, this high-powered laser allows Wavelength Division Multiplexing (WDM) system designers to achieve significant gains in terms of flexibility, inventory management and cost reduction.

Associated with an external modulator, the Alcatel 1935 TLI laser module is dedicated to 2.5 Gbit/s, 10 Gbit/s and 40 Gbit/s long reach and very-long reach WDM transmissions. It covers C and L bands, with output power up to 20 mW. In a 14-pin butterfly standard package, it combines a DFB laser chip, a Fabry-Perrot filter and two monitoring photodiodes. Wavelength tunability is achieved by modification of laser chip temperature. The standardized module size and pin-out offer complete compatibility with standard continuous WDM lasers.

About Alcatel Optronics:

Alcatel Optronics designs, manufactures and sells high performance optical components, modules and integrated sub-systems for use in terrestrial and submarine optical telecommunications networks. For more information, visit www.alcatel.com/optronics.

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