The environmental parameter may be, for example, supply voltage, humidity, acceleration, ambient light levels, ambient vibration, magnetic flux intensity, ambient interior transceiver temperature, or any other environmental parameter that may affect the performance of an optoelectronic device and that may be compensated for by suitable adjustment of one or more operational parameters.
Such controllers, while partially effective, nonetheless suffer from various disadvantages. Other parameters that are critical to proper operation of a laser and that are affected by LSE include extinction ratio (âERâ), which is a ratio of 1) the difference between a âdark levelâ of the laser, i.e., a point at which no light is produced by the laser, and the low light (logic â0â) level; and 2) the difference between the dark level and the high light (logic â1â) level. Information regarding ER and OMA determination could then be provided to the Host, or stored in non-volatile memory for other purposes.Again, and as mentioned above, should communication with the external host In addition, compensation for LSE as described herein enables estimation of remaining lifetime of the laser, thereby allowing changeout of the transceiver at a prudent time before failure of the laser occurs. 5A, stage 610 will determine that a relatively smaller modulation current need be provided to the laser 402 in order to produce a sufficiently high and low light levels. via social media:If you want to place a link to this article in some other resource (e.g. determine a slope efficiency of the laser using at least some of the data acquired by the plurality of sensors, wherein execution by the processor to determine the slope efficiency further comprises execution of the following: Calculation of laser slope efficiency in an optical transceiver module
This relationship is depicted in the following equation:In accordance with one embodiment, therefore, a method is followed to enable dynamic determination of and compensation for LSE of a laser, such as the laser The storage of laser slope efficiency data can be useful for several reasons, among them, benchmarking purposes for future calculations, determining prior settings when the transceiver is powered on after a period of shut-off, or for estimation purposes when time does not allow for a full laser slope efficiency calculation to be made. One of these factors is laser temperature. This method is periodically repeated to ensure proper laser calibration.These and other features of the present invention will become more fully apparent from the following description and appended claims, or may be learned by the practice of the invention as set forth hereinafter.To further clarify the above and other advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings. For instance, should stage 608 calculate a laser slope efficiency similar to that shown in FIG. Among the disadvantages is the fact that the compensation table used by the controller must be predefined during optical transmitter manufacture, and as such, is not capable of dynamic laser modification according to present operating requirements. quantum communicationDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICALArrangements for controlling the laser output parameters, e.g. Operational parameters also include, for example, a laser wavelength approximation, a laser temperature measurement, a transceiver temperature measurement, a laser bias current measurement, a Thermo Electric Cooler (TEC) current measurement, a transmit power measurement, a receive power measurement, or the like.In one embodiment, the host communication interface Having described a specific environment with respect to The electrical data signal is supplied to the laser In further detail, upon sensing the light a resultant current is produced by the photodiode sensor In the illustrated embodiment, the analog data sensed by the sensor As has been explained, each of the analog signals sensed by the sensors The relationship between laser power and laser current is represented in A predetermined amount of laser current indicated at B on the horizontal axis of the graph As multiple data points are needed to define the curve Determination of LSE for a particular laser is critical in transceiver laser operations because the average light level and various other parameters are affected thereby. Examples of operating parameters for a laser include its average light level, extinction ratio, and optical modulation amplitude.Known attempts for compensating for laser characteristics dependent upon temperature have involved the use of temperature-sensitive analog components to alert for the need to adjust laser current during operation, which in turn desirably affects laser temperature. Environmental parameters may also be independent of the operation of the optoelectronic device, but may, nevertheless, affect operational parameters. Provisional Patent Application No. Thus by configuring transceivers with the dynamic ability to compensate for such age-related changes, the transceiver can be left in use a relatively longer period of time when compared with a transceiver having no such functionality.The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics.
Such controllers, while partially effective, nonetheless suffer from various disadvantages. Other parameters that are critical to proper operation of a laser and that are affected by LSE include extinction ratio (âERâ), which is a ratio of 1) the difference between a âdark levelâ of the laser, i.e., a point at which no light is produced by the laser, and the low light (logic â0â) level; and 2) the difference between the dark level and the high light (logic â1â) level. Information regarding ER and OMA determination could then be provided to the Host, or stored in non-volatile memory for other purposes.Again, and as mentioned above, should communication with the external host In addition, compensation for LSE as described herein enables estimation of remaining lifetime of the laser, thereby allowing changeout of the transceiver at a prudent time before failure of the laser occurs. 5A, stage 610 will determine that a relatively smaller modulation current need be provided to the laser 402 in order to produce a sufficiently high and low light levels. via social media:If you want to place a link to this article in some other resource (e.g. determine a slope efficiency of the laser using at least some of the data acquired by the plurality of sensors, wherein execution by the processor to determine the slope efficiency further comprises execution of the following: Calculation of laser slope efficiency in an optical transceiver module
This relationship is depicted in the following equation:In accordance with one embodiment, therefore, a method is followed to enable dynamic determination of and compensation for LSE of a laser, such as the laser The storage of laser slope efficiency data can be useful for several reasons, among them, benchmarking purposes for future calculations, determining prior settings when the transceiver is powered on after a period of shut-off, or for estimation purposes when time does not allow for a full laser slope efficiency calculation to be made. One of these factors is laser temperature. This method is periodically repeated to ensure proper laser calibration.These and other features of the present invention will become more fully apparent from the following description and appended claims, or may be learned by the practice of the invention as set forth hereinafter.To further clarify the above and other advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings. For instance, should stage 608 calculate a laser slope efficiency similar to that shown in FIG. Among the disadvantages is the fact that the compensation table used by the controller must be predefined during optical transmitter manufacture, and as such, is not capable of dynamic laser modification according to present operating requirements. quantum communicationDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICALArrangements for controlling the laser output parameters, e.g. Operational parameters also include, for example, a laser wavelength approximation, a laser temperature measurement, a transceiver temperature measurement, a laser bias current measurement, a Thermo Electric Cooler (TEC) current measurement, a transmit power measurement, a receive power measurement, or the like.In one embodiment, the host communication interface Having described a specific environment with respect to The electrical data signal is supplied to the laser In further detail, upon sensing the light a resultant current is produced by the photodiode sensor In the illustrated embodiment, the analog data sensed by the sensor As has been explained, each of the analog signals sensed by the sensors The relationship between laser power and laser current is represented in A predetermined amount of laser current indicated at B on the horizontal axis of the graph As multiple data points are needed to define the curve Determination of LSE for a particular laser is critical in transceiver laser operations because the average light level and various other parameters are affected thereby. Examples of operating parameters for a laser include its average light level, extinction ratio, and optical modulation amplitude.Known attempts for compensating for laser characteristics dependent upon temperature have involved the use of temperature-sensitive analog components to alert for the need to adjust laser current during operation, which in turn desirably affects laser temperature. Environmental parameters may also be independent of the operation of the optoelectronic device, but may, nevertheless, affect operational parameters. Provisional Patent Application No. Thus by configuring transceivers with the dynamic ability to compensate for such age-related changes, the transceiver can be left in use a relatively longer period of time when compared with a transceiver having no such functionality.The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics.