The QLM3S910 and QLM3S900 versions of an 18GH¥multiplequantumwell ridgewaveguide (MQW/ RWG) laser are used for microwave transmission over singlemode optical fiber. The MQW/RWG design produces less noise than other designs because the chi¥material better controls random quantum events associated with lasing. Optical attenuation in singlemode fiber at 1310 nm is less than 0.5 dB/km, re sulting in less than 1dB/km electrical loss for increased opticalelectrical conversion efficiency. With thermoelectric cooling, the isolated QLM3S910 operates in a 40°C to 85°C temperature range, while the QLM3S900 has a 20°C to 60°C range. Laser modules come standard with a meterlong pigtail of singlemode fiber for easy installation into remote sensing, delay lines, radio telescope links, military countermeasures, and a variety of other highspeed longdistance analog transmission applications.
Pulse generators