Multi-channel optoelectronic module

Abstract

In one example, an optoelectronic transceiver includes an optical transmitter with which a set of operating wavelengths is associated. A temperature sensor and heat transfer device are thermally coupled with the optical transmitter, and drive circuitry is provided that is in communication with the heat transfer device. The optoelectronic transceiver further includes a control device in communication with the temperature sensor and with the driver circuitry. The control device includes a memory within which is stored several temperature control values, where each of the temperature control values is associated with a respective operating wavelength of the optical transmitter. Finally, the control device includes logic coupled with the memory, wherein an output of the logic is a command signal that concerns operation of the driver circuitry and corresponds with a selected operating wavelength. The command signal is based in part upon a temperature control value and input from the temperature sensor.

1 . An optoelectronic device, comprising:
 an optoelectronic assembly that includes a laser diode for emitting light;   a temperature controller coupled to the laser diode for controlling the temperature of the laser diode;   at least one temperature sensor for detecting a temperature associated with the laser diode; and   control apparatus coupled to the at least one temperature sensor and to temperature controller, the control apparatus including:
 memory configured to store a plurality of a temperature control values, each stored temperature control value associated with a respective operating wavelength of a plurality of operating wavelengths of the laser diode; 
 an interface for receiving at least one temperature sensor signal from the at least one temperature sensor; and 
 logic, coupled to the memory and the interface and configured to generate a command signal for controlling the temperature controller in accordance with a selected operating wavelength of the plurality of operating wavelengths, the logic configured to receive from the memory the temperature control value associated with the selected operating wavelength and to generate the command signal in accordance with the temperature control value and the at least one temperature sensor signal. 
   
   
   
       2 . The optoelectronic device of  claim 1 , wherein:
 the at least one temperature sensor includes a laser temperature sensor for monitoring a temperature from within the optoelectronic assembly and an ambient temperature sensor for monitoring an ambient temperature within a housing in which the optoelectronic assembly resides; and   the logic is configured to generate the command signal as a function of both the temperature within the optoelectronic assembly and the monitored ambient temperature.   
   
   
       3 . The optoelectronic device of  claim 1 , wherein each stored temperature control value, stored in the memory, is associated with a temperature that falls within a range of about 30° C. to about 50° C. 
   
   
       4 . An optoelectronic transceiver, comprising:
 an optical transmitter with which a set of operating wavelengths is associated;   a temperature sensor thermally coupled with the optical transmitter;   a heat transfer device thermally coupled with the optical transmitter;   driver circuitry in communication with the heat transfer device; and   a control device in communication with the temperature sensor and with the driver circuitry, and the control device comprising:
 memory within which is stored a plurality of temperature control values, each of the temperature control values being associated with a respective operating wavelength of the optical transmitter; and 
 logic coupled with the memory, an output of the logic comprising a command signal that concerns operation of the driver circuitry, the command signal being based at least in part upon a temperature control value and upon input from the temperature sensor, and the command signal corresponding with a selected operating wavelength. 
   
   
   
       5 . The optoelectronic transceiver as recited in  claim 4 , wherein the optoelectronic transceiver is substantially compliant with one of: the GBIC standard; the SFP MSA. 
   
   
       6 . The optoelectronic transceiver as recited in  claim 4 , wherein the optical transmitter comprises an LED. 
   
   
       7 . The optoelectronic transceiver as recited in  claim 4 , wherein the optical transmitter comprises a laser. 
   
   
       8 . The optoelectronic transceiver as recited in  claim 4 , wherein the optical transmitter comprises a DFB laser. 
   
   
       9 . The optoelectronic transceiver as recited in  claim 4 , wherein each operating wavelength corresponds with a respective operating channel of the optoelectronic transceiver. 
   
   
       10 . The optoelectronic transceiver as recited in  claim 4 , wherein the heat transfer device comprises a TEC. 
   
   
       11 . The optoelectronic transceiver as recited in  claim 4 , wherein the control device comprises an 8-bit CMOS FLASH microcontroller. 
   
   
       12 . The optoelectronic transceiver as recited in  claim 4 , wherein the memory includes a temperature lookup table within which the plurality of temperature control values and respective corresponding operating wavelengths are stored. 
   
   
       13 . The optoelectronic transceiver as recited in  claim 4 , wherein the memory includes a channel lookup table within which channel-specific information is stored for each of a plurality operating channels of the optoelectronic transceiver, at least some of the channel-specific information forming part of a basis for the command signal and the channel-specific information comprising one or more of:
 a channel number;   an operating temperature;   an I LASER BIAS  value; and   an AC modulation value.   
   
   
       14 . The optoelectronic transceiver as recited in  claim 4 , wherein the command signal comprises a TEC command signal. 
   
   
       15 . The optoelectronic transceiver as recited in  claim 4 , wherein the logic is implemented by software instructions that are executable by the control device. 
   
   
       16 . The optoelectronic transceiver as recited in  claim 4 , wherein the optoelectronic transceiver further comprises an interface by way of which operating instructions can be received during operation of the optoelectronic transceiver, and the interface being in communication with the memory and with the logic. 
   
   
       17 . The optoelectronic transceiver as recited in  claim 4 , wherein each operating wavelength corresponds with a respective ITU channel. 
   
   
       18 . The optoelectronic transceiver as recited in  claim 4 , wherein channel spacing of the set of operating wavelengths substantially conforms with one of the following standards: 25 GHz; 50 GHz; 100 GHz; 200 GHz. 
   
   
       19 . The optoelectronic transceiver as recited in  claim 4 , wherein each of the plurality of temperature control values is associated with an optoelectronic transceiver operating temperature that falls within a range of about 30° C. to about 50° C. 
   
   
       20 . The optoelectronic transceiver as recited in  claim 4 , wherein one of the plurality of temperature control values is associated with an optoelectronic transceiver operating temperature of about 50° C. 
   
   
       21 . The optoelectronic transceiver as recited in  claim 4 , further comprising an ambient temperature sensor coupled with the control device, the command signal being based at least in part on temperature data obtained by the ambient temperature sensor.