+44 (0)24 7671 8970
More publications     •     Advertise with us     •     Contact us
 
Technical Insight

Uncooled 980 nm pump laser modules (Research Review)

Fiber-optic systems designers are increasingly concerned with cost, size and power consumption of EDFAs, particularly in metropolitan and cross-connect systems. Thus, highly-efficient pump laser modules that require no active cooling are of great interest. T Pliska and colleagues from Nortel Networks Optical Components in Zurich, Switzerland (Elec. Lett. 2001 37(1) 33) describe the operation of ridge wave-guide lasers at 980 nm. These devices exhibit an efficiency that is only weakly dependent on increasing temperature. The authors subjected a submarine-qualified G05 InGaAs/AlGaAs laser packaged in a butterfly module to temperature testing without active cooling. At 10C, the fiber output power was 250 mW, with a wall-plug efficiency of 35%. When the temperatures are increased to 75 and subsequently 100C, output powers of 150 and 95 mW were obtained, respectively. Under these conditions, the shift in the peak emission wavelength as a function of temperature is only 0.6 nm over a 90C temperature range. The authors attribute the excellent stability and high power performance to the diode s fiber Bragg grating, which is instrumental in maintaining a high level of reliability across the entire range of operating conditions.
×
Search the news archive

To close this popup you can press escape or click the close icon.
×
Logo
×
Register - Step 1

You may choose to subscribe to the Compound Semiconductor Magazine, the Compound Semiconductor Newsletter, or both. You may also request additional information if required, before submitting your application.


Please subscribe me to:

 

You chose the industry type of "Other"

Please enter the industry that you work in:
Please enter the industry that you work in: