JDS Uniphase Corp. today announced a family of temperature tunable, directly modulated lasers (DML) and added to its fixed wavelength product line for 2.5- Gbit/sec systems. The low cost of DMLs make them key products for two developing areas in fiber-optic communications, claims the company: the metro and access market segments.
With its CQF413 Series for 2.5-Gbit/sec systems are two-channel tunable for the 100-GHz ITU and are available in100-km and extended reach 180-km versions and for both low (2.5 mW) and high (10 mW) peak output power levels.
JDS Uniphase also introduced the CQF915/508, a low power (2.5 mW), extended reach (180 km), fixed wavelength DML for 2.5-Gbit/sec systems. With this product, the CQF 915 Series now includes models for both low and high power, and for both standard and extended reach applications.
DMLs meet performance requirements for span lengths typical of the metro and access markets. Other laser sources, such as continuous wave (CW) lasers with external modulators or electro-absorption modulated lasers (EMLs) are well-suited for much longer spans but are more expensive for metro and access applications.
JDS Uniphase DMLs have sufficient performance (low chirp) for extended reach (180 km) and are stable enough that wavelength lockers are not required, which offers additional savings potential at the systems level, say company representatives. They include a thermo-electric cooler and can operate in uncontrolled environments up to 85 degrees Celsius. The CQF 413 and CQF 915 Series are available for both the C- and L-bands.
The CQF 413 Series and the CQF 915 Series can be used in WDM metro architectures and in cable television (CATV) networks, where high optical output power and very low dispersion are required. They are especially suitable for systems operating in environments with uncontrolled ambient temperature.
JDS Uniphase (Ottawa, Canada, and San Jose, CA) designs, develops, manufactures, and sells a range of products for high-performance fiber-optic communications applications. For more information, visit the company's Web site at www.jdsu.com.