August 27, 2002 - The Electronic Device Group of Mitsubishi Electric & Electronics USA today introduced the ML9XX37 singlemode distributed feedback (DFB) laser diode, a continuous-wave light source for 40-Gbit/sec networks. The ML9XX37 boasts a power output of at least 60 mW throughout a temperature range of 0° to 50°C. The device also reduces network system costs by providing temperature-controlled wavelength tuning and by extending transmissions to beyond 100 km, when coupled with a 10-Gbit/sec external modulator.
The ML9XX37 covers five channels within the C-band (1530 -1565 nm) for external modulation in DWDM applications, with 0.8-nm wavelength ITU-grid spacing between channels. The device's temperature-controlled wavelength tuning can reduce module backup costs by as much as 80 percent for five-channel systems, because customers can tune one backup module for any of the five channels, thereby eliminating the need for customers to keep five non-tunable backup modules - one for each channel.
The laser diode's 100-km reach, when coupled with a 10-Gbit/sec external modulator, can save significant system costs for extremely long-reach fiber-optic applications because fewer laser diodes are necessary to place in tandem for the entire length of the network. The ML9XX37 DFB laser diode's extremely narrow line width of less than 1 MHz contributes to its long-distance transmission capability as well as making it an excellent choice for DWDM applications. The device's 40-decibel (typical) side mode suppression ratio (SMSR) minimizes pulse signal degradation.
Packaging, availability, and pricing
The ML9XX37 continuous-wave DFB laser diode is supplied with a carrier for easy handling and to enable chip-on-carrier production. Samples are available in September 2002, with volume production scheduled for January 2003. Pricing is $305 each in sample quantities. Additional information is available at http://www.mitsubishichips.com.