发明名称 |
Retrofit heater for erbium fiber in an erbium-doped fiber amplifier (EDFA) |
摘要 |
A heater system for heating an erbium-doped fiber amplifier (EDFA) of a fiber optic communication system operable in an environment. The heater system includes a pump laser for providing optical power to an erbium fiber in the EDFA. The pump laser is cooled by a thermoelectric cooler (TEC) when a predetermined maximum temperature is reached to maintain the temperature of the laser below the maximum temperature value. The temperature of the laser is sensed by a temperature sensor and is conveyed to a control circuit for generating a control signal. A heater unit is thermally connected to the erbium fiber and is controlled by the control signal in the event that the sensed temperature falls below a predetermined minimum value to maintain the temperature of the fiber above the minimum temperature value. A switch is connected between the control circuit, the TEC and the heater to automatically direct current to either the heater or the TEC depending on the sensed temperature.
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申请公布号 |
US6147795(A) |
申请公布日期 |
2000.11.14 |
申请号 |
US19990336998 |
申请日期 |
1999.06.21 |
申请人 |
LUCENT TECHNOLOGIES INC. |
发明人 |
DERBYSHIRE, WILLIAM E.;JAMESON, RALPH STEPHEN;NGUYEN, KHANH CONG |
分类号 |
H01S3/04;H01S3/094;H01S3/0941;H01S5/024;H01S5/068;(IPC1-7):H04B10/04;G02B6/36 |
主分类号 |
H01S3/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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