CN113141215A - SOA current automatic control method and system integrated in optical module - Google Patents

SOA current automatic control method and system integrated in optical module Download PDF

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Publication number
CN113141215A
CN113141215A CN202110394173.6A CN202110394173A CN113141215A CN 113141215 A CN113141215 A CN 113141215A CN 202110394173 A CN202110394173 A CN 202110394173A CN 113141215 A CN113141215 A CN 113141215A
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China
Prior art keywords
soa
current
target
optical signal
rssi
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CN113141215B (en
Inventor
孙朝元
彭奇
鲁妹玲
田永猛
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Source Photonics Chengdu Co Ltd
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Source Photonics Chengdu Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • G05F1/561—Voltage to current converters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/1607—Supply circuits

Abstract

The invention relates to an SOA current automatic control method and system integrated in an optical module, which comprises the following steps: setting initial SOA amplification current and a corresponding threshold value thereof, if an optical signal received by a receiving end ROSA of an optical module is within the corresponding threshold value after the initial SOA amplification current, carrying out the next step, otherwise, waiting for the next optical signal received by the receiving end ROSA; setting a plurality of groups of SOA target currents, wherein the initial SOA amplified current is any one of the plurality of groups of SOA target currents; and correspondingly setting a group of RSSI target threshold value ranges for each group of SOA target currents, judging whether the optical signals received by the ROSA at the receiving end of the optical module are within the RSSI target threshold value range corresponding to the initial SOA amplified current after the optical signals are subjected to the initial SOA amplified current, if not, adjusting to the adjacent group of SOA target currents until the optical signals received by the ROSA at the receiving end of the optical module are within the RSSI target threshold value range corresponding to the group of SOA target currents after the optical signals are subjected to the SOA target current amplification, and outputting the amplified signals to the receiver PD.

Description

SOA current automatic control method and system integrated in optical module
Technical Field
The invention relates to the technical field of signal control, in particular to an SOA current automatic control method and system integrated on an optical module.
Background
When the optical module at the home end receives an optical signal sent by the optical module at the far end, the optical signal is attenuated to a certain extent through optical fiber transmission, the longer the optical fiber transmission path is, the more serious the optical signal is, but the receiver PD at the receiving end of each optical module has sensitivity in a fixed range, and if the optical signal received by the optical module cannot reach the sensitivity range of the PD due to attenuation, the maximum bit error rate allowed by the optical module system cannot be met by the optical signal received by the PD.
Disclosure of Invention
The invention aims to enable a receiver PD at the receiving end of an optical module to receive error-free optical signals, and provides an SOA current automatic control method and system integrated in the optical module.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
an SOA current automatic control method integrated in an optical module comprises the following steps:
step S1: setting an initial SOA amplification current and a corresponding threshold value thereof, if an optical signal received by an optical module receiving end ROSA is within the corresponding threshold value after the initial SOA amplification current, carrying out the next step, otherwise, keeping the initial SOA amplification current to continuously monitor the input optical signal;
step S2: setting a plurality of groups of SOA target currents, wherein the initial SOA amplified current is any one of the plurality of groups of SOA target currents; and correspondingly setting a group of RSSI target threshold value ranges for each group of SOA target currents, judging whether the optical signals received by the ROSA at the receiving end of the optical module are within the RSSI target threshold value range corresponding to the initial SOA amplified current after the optical signals are subjected to the initial SOA amplified current, if not, adjusting to the adjacent group of SOA target currents until the optical signals received by the ROSA at the receiving end of the optical module are within the RSSI target threshold value range corresponding to the group of SOA target currents after the optical signals are subjected to the SOA target current amplification, and outputting the amplified signals to the receiver PD.
Furthermore, a group of RSSI target thresholds correspondingly set for each group of SOA target currents includes an RSSI target upper limit threshold and an RSSI target lower limit threshold, and the RSSI target upper limit threshold corresponding to the same group of SOA target currents is greater than the RSSI target lower limit threshold corresponding to the group of SOA target currents.
Furthermore, the plurality of groups of SOA target currents are arranged from small to large, and the RSSI target upper limit threshold of the subsequent group of SOA target currents is larger than the RSSI target lower limit threshold of the previous group of SOA target currents but smaller than the RSSI target upper limit threshold of the previous group of SOA target currents.
Furthermore, when the optical signal received by the optical module receiving end ROSA is amplified by the initial SOA and then is larger than the RSSI target upper limit threshold corresponding to the initial SOA amplification current, the initial SOA amplification current is adjusted to a previous group of SOA target currents of the initial SOA amplification current;
when the optical signal received by the receiver ROSA of the optical module is amplified by the initial SOA and then is smaller than the RSSI target lower limit threshold corresponding to the initial SOA amplified current, the initial SOA amplified current is adjusted to a group of SOA target currents behind the initial amplified current.
Still further, the initial SOA amplification current is set to an intermediate set of a plurality of sets of SOA target currents.
Furthermore, when the optical signal received by the optical module receiving end ROSA is amplified by the last group of SOA target currents and is still smaller than the RSSI target lower limit threshold corresponding to the last group of SOA target currents, the last group of SOA target currents are adjusted back to the initial SOA amplification currents so as to continuously monitor the input optical signal.
An SOA current automatic control system integrated in an optical module is characterized in that: the method comprises the following steps:
the receiving end ROSA is used for receiving an optical signal transmitted by the optical module at the far end through the optical fiber;
the optical signal amplifier SOA is used for amplifying an optical signal from a receiving end ROSA receiving end, judging whether the amplified optical signal is in the sensitivity range of the receiver PD, if so, outputting the amplified optical signal to the receiver PD, otherwise, continuously monitoring the input optical signal;
and the receiver PD is used for receiving the optical signal amplified by the optical signal amplifier SOA.
Still further, a processor is included for calculating an actual optical signal received by the receiving end ROSA based on the optical signal received by the receiver PD and the SOA target current of the optical signal amplifier SOA.
Still further, the optical signal amplifier system further comprises an adjustable power supply module for outputting an adjustable current to the optical signal amplifier SOA, wherein the adjustable current comprises an initial SOA amplification current.
Further, the adjustable current further comprises a plurality of sets of SOA target currents, and the initial SOA amplification current is any one of the plurality of sets of SOA target currents.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the optical signal amplifier SOA is added between the receiver ROSA and the receiver PD of the optical module, and the target current of the optical signal amplifier SOA is adjusted, so that the optical signal attenuated by the optical fiber transmission of the remote optical module can be received within the sensitivity range of the receiver PD.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a flow chart of an SOA current automatic control method of the present invention;
FIG. 2 is a schematic diagram of SOA target current and RSSI target threshold range according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of an SOA current automatic control system of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "preceding group", "succeeding group", "upper limit", "lower limit", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying a relative order of importance.
When the optical module at the home end receives an optical signal sent by the optical module at the far end, the optical signal is attenuated to a certain extent through optical fiber transmission, the longer the optical fiber transmission path is, the more serious the optical signal is, but the receiving end PD of each optical module has sensitivity in a fixed range, and if the optical signal received by the optical module cannot reach the sensitivity range of the PD due to attenuation, the optical signal received by the PD cannot meet the maximum error rate allowed by the optical module system.
Therefore, in the scheme, an optical signal amplifier SOA (SOA for short) is added between a receiver ROSA and a receiver PD (PD for short), and an optical signal sent by a remote optical module through a transmitter TOSA of the remote optical module is amplified in a certain proportion through the SOA of the local optical module and then received by the PD by adjusting the amplified current of the SOA, so that the optical signal transmitted by the remote optical module reaches the local end and is received in the sensitivity range of the PD, and the optical signal received by the PD can meet the requirement of the error rate of an optical module system.
However, the amplification current of the optical signal amplifier SOA cannot be too large, otherwise, the PD is burned out after the optical signal transmitted from the far end is excessively amplified; the error rate can not be too small, otherwise, the sensitivity range of PD can not be reached, and the error rate which can be tolerated by an optical module system can be well solved. Therefore, after receiving the optical signal sent by the remote optical module, the amplification current of the optical signal amplifier SOA needs to be adjusted in real time according to the attenuation degree of the optical signal, so that the optical signal can be ensured within the sensitivity receiving range of the PD after passing through the optical signal amplifier SOA, and thus the optical signal received by the PD can meet the maximum error rate tolerated by the system.
SOA1 SOA2 SOA3 SOA4 SOA5
RX input(dB) 31.87 40.6 49.33 58.06 66.79
RX input1 5.43 RSSI011 RSSI012 RSSI013 RSSI014 RSSI015
RX input2 4.705 RSSI021 RSSI022 RSSI023 RSSI024 RSSI025
RX input3 3.98 RSSI031 RSSI032 RSSI033 RSSI034 RSSI035
RX input4 3.255 RSSI041 RSSI042 RSSI043 RSSI044 RSSI045
RX input5 2.47 RSSI051 RSSI052 RSSI053 RSSI054 RSSI055
RX input6 1.195 RSSI061 RSSI062 RSSI063 RSSI064 RSSI065
RX input7 0.645 RSSI071 RSSI072 RSSI073 RSSI074 RSSI075
RX input8 -0.37 RSSI081 RSSI082 RSSI083 RSSI084 RSSI085
RX input9 -0.57 RSSI091 RSSI092 RSSI093 RSSI094 RSSI095
RX input10 -1.62125 RSSI101 RSSI102 RSSI103 RSSI104 RSSI105
RX input11 -2.2725 RSSI111 RSSI112 RSSI113 RSSI114 RSSI115
RX input12 -2.92375 RSSI121 RSSI122 RSSI123 RSSI124 RSSI125
RX input13 -3.575 RSSI131 RSSI132 RSSI133 RSSI134 RSSI135
RX input14 -4.22625 RSSI141 RSSI142 RSSI143 RSSI144 RSSI145
RX input15 -4.8775 RSSI151 RSSI152 RSSI153 RSSI154 RSSI155
RX input16 -5.58 RSSI161 RSSI162 RSSI163 RSSI164 RSSI165
RX input17 -5.98 RSSI171 RSSI172 RSSI173 RSSI174 RSSI175
RX input18 -6.905 RSSI181 RSSI182 RSSI183 RSSI184 RSSI185
RX input19 -7.505 RSSI191 RSSI192 RSSI193 RSSI194 RSSI195
RX input20 -8.105 RSSI201 RSSI202 RSSI203 RSSI204 RSSI205
RX input21 -8.705 RSSI211 RSSI212 RSSI213 RSSI214 RSSI215
RX input22 -9.305 RSSI221 RSSI222 RSSI223 RSSI224 RSSI225
RX input23 -9.905 RSSI231 RSSI232 RSSI233 RSSI234 RSSI235
RX input24 -10.505 RSSI241 RSSI242 RSSI243 RSSI244 RSSI245
RX input25 -11.23 RSSI251 RSSI252 RSSI253 RSSI254 RSSI255
RX input26 -11.88 RSSI261 RSSI262 RSSI263 RSSI264 RSSI265
RX input27 -12.48 RSSI271 RSSI272 RSSI273 RSSI274 RSSI275
RX input28 -13.08 RSSI281 RSSI282 RSSI283 RSSI284 RSSI285
RX input29 -13.68 RSSI291 RSSI292 RSSI293 RSSI294 RSSI295
RX input30 -14.88 RSSI301 RSSI302 RSSI303 RSSI304 RSSI305
RX input31 -15.48 RSSI311 RSSI312 RSSI313 RSSI314 RSSI315
RX input32 -16.08 RSSI321 RSSI322 RSSI323 RSSI324 RSSI325
RX input33 -16.28 RSSI331 RSSI332 RSSI333 RSSI334 RSSI335
RX input34 -17.28 RSSI341 RSSI342 RSSI343 RSSI344 RSSI345
RX input35 -17.99 RSSI351 RSSI352 RSSI353 RSSI354 RSSI355
RX input36 -18.48 RSSI361 RSSI362 RSSI363 RSSI364 RSSI365
RX input37 -19.08 RSSI371 RSSI372 RSSI373 RSSI374 RSSI375
RX input38 -19.68 RSSI381 RSSI382 RSSI383 RSSI384 RSSI385
RX input39 -20.28 RSSI391 RSSI392 RSSI393 RSSI394 RSSI395
RX input40 -20.88 RSSI401 RSSI402 RSSI403 RSSI404 RSSI405
RX input41 -21.22 RSSI411 RSSI412 RSSI413 RSSI414 RSSI415
RX input42 -22.08 RSSI421 RSSI422 RSSI423 RSSI424 RSSI425
RX input43 -22.68 RSSI431 RSSI432 RSSI433 RSSI434 RSSI435
RX input44 -23.28 RSSI441 RSSI442 RSSI443 RSSI444 RSSI445
RX input45 -23.88 RSSI451 RSSI452 RSSI453 RSSI454 RSSI455
RX input46 -24.49 RSSI461 RSSI462 RSSI463 RSSI464 RSSI465
RX input47 -25.08 RSSI471 RSSI472 RSSI473 RSSI474 RSSI475
RX input48 -25.68 RSSI481 RSSI482 RSSI483 RSSI484 RSSI485
RX input49 -25.99 RSSI491 RSSI492 RSSI493 RSSI494 RSSI495
RX input50 -26.705 RSSI501 RSSI502 RSSI503 RSSI504 RSSI505
RX input51 -27.305 RSSI511 RSSI512 RSSI513 RSSI514 RSSI515
RX input52 -27.905 RSSI521 RSSI522 RSSI523 RSSI524 RSSI525
RX input53 -28.505 RSSI531 RSSI532 RSSI533 RSSI534 RSSI535
RX input54 -29.105 RSSI541 RSSI542 RSSI543 RSSI544 RSSI545
TABLE 1-1
SOA6 SOA7 SOA8 SOA9 SOA10 SOA11
RX input(dB) 75.52 84.26 92.99 101.72 110.46 119.19
RX input1 5.43 RSSI016 RSSI017 RSSI018 RSSI019 RSSI0110 RSSI0111
RX input2 4.705 RSSI026 RSSI027 RSSI028 RSSI029 RSSI0210 RSSI0211
RX input3 3.98 RSSI036 RSSI037 RSSI038 RSSI039 RSSI0310 RSSI0311
RX input4 3.255 RSSI046 RSSI047 RSSI048 RSSI049 RSSI0410 RSSI0411
RX input5 2.47 RSSI056 RSSI057 RSSI058 RSSI059 RSSI0510 RSSI0511
RX input6 1.195 RSSI066 RSSI067 RSSI068 RSSI069 RSSI0610 RSSI0611
RX input7 0.645 RSSI076 RSSI077 RSSI078 RSSI079 RSSI0710 RSSI0711
RX input8 -0.37 RSSI086 RSSI087 RSSI088 RSSI089 RSSI0810 RSSI0811
RX input9 -0.57 RSSI096 RSSI097 RSSI098 RSSI099 RSSI0910 RSSI0911
RX input10 -1.62125 RSSI106 RSSI107 RSSI108 RSSI109 RSSI1010 RSSI1011
RX input11 -2.2725 RSSI116 RSSI117 RSSI118 RSSI119 RSSI1110 RSSI1111
RX input12 -2.92375 RSSI126 RSSI127 RSSI128 RSSI129 RSSI1210 RSSI1211
RX input13 -3.575 RSSI136 RSSI137 RSSI138 RSSI139 RSSI1310 RSSI1311
RX input14 -4.22625 RSSI146 RSSI147 RSSI148 RSSI149 RSSI1410 RSSI1411
RX input15 -4.8775 RSSI156 RSSI157 RSSI158 RSSI159 RSSI1510 RSSI1511
RX input16 -5.58 RSSI166 RSSI167 RSSI168 RSSI169 RSSI1610 RSSI1611
RX input17 -5.98 RSSI176 RSSI177 RSSI178 RSSI179 RSSI1710 RSSI1711
RX input18 -6.905 RSSI186 RSSI187 RSSI188 RSSI189 RSSI1810 RSSI1811
RX input19 -7.505 RSSI196 RSSI197 RSSI198 RSSI199 RSSI1910 RSSI1911
RX input20 -8.105 RSSI206 RSSI207 RSSI208 RSSI209 RSSI2010 RSSI2011
RX input21 -8.705 RSSI216 RSSI217 RSSI218 RSSI219 RSSI2110 RSSI2111
RX input22 -9.305 RSSI226 RSSI227 RSSI228 RSSI229 RSSI2210 RSSI2211
RX input23 -9.905 RSSI236 RSSI237 RSSI238 RSSI239 RSSI2310 RSSI2311
RX input24 -10.505 RSSI246 RSSI247 RSSI248 RSSI249 RSSI2410 RSSI2411
RX input25 -11.23 RSSI256 RSSI257 RSSI258 RSSI259 RSSI2510 RSSI2511
RX input26 -11.88 RSSI266 RSSI267 RSSI268 RSSI269 RSSI2610 RSSI2611
RX input27 -12.48 RSSI276 RSSI277 RSSI278 RSSI279 RSSI2710 RSSI2711
RX input28 -13.08 RSSI286 RSSI287 RSSI288 RSSI289 RSSI2810 RSSI2811
RX input29 -13.68 RSSI296 RSSI297 RSSI298 RSSI299 RSSI2910 RSSI2911
RX input30 -14.88 RSSI306 RSSI307 RSSI308 RSSI309 RSSI3010 RSSI3011
RX input31 -15.48 RSSI316 RSSI317 RSSI318 RSSI319 RSSI3110 RSSI3111
RX input32 -16.08 RSSI326 RSSI327 RSSI328 RSSI329 RSSI3210 RSSI3211
RX input33 -16.28 RSSI336 RSSI337 RSSI338 RSSI339 RSSI3310 RSSI3311
RX input34 -17.28 RSSI346 RSSI347 RSSI348 RSSI349 RSSI3410 RSSI3411
RX input35 -17.99 RSSI356 RSSI357 RSSI358 RSSI359 RSSI3510 RSSI3511
RX input36 -18.48 RSSI366 RSSI367 RSSI368 RSSI369 RSSI3610 RSSI3611
RX input37 -19.08 RSSI376 RSSI377 RSSI378 RSSI379 RSSI3710 RSSI3711
RX input38 -19.68 RSSI386 RSSI387 RSSI388 RSSI389 RSSI3810 RSSI3811
RX input39 -20.28 RSSI396 RSSI397 RSSI398 RSSI399 RSSI3910 RSSI3911
RX input40 -20.88 RSSI406 RSSI407 RSSI408 RSSI409 RSSI4010 RSSI4011
RX input41 -21.22 RSSI416 RSSI417 RSSI418 RSSI419 RSSI4110 RSSI4111
RX input42 -22.08 RSSI426 RSSI427 RSSI428 RSSI429 RSSI4210 RSSI4211
RX input43 -22.68 RSSI436 RSSI437 RSSI438 RSSI439 RSSI4310 RSSI4311
RX input44 -23.28 RSSI446 RSSI447 RSSI448 RSSI449 RSSI4410 RSSI4411
RX input45 -23.88 RSSI456 RSSI457 RSSI458 RSSI459 RSSI4510 RSSI4511
RX input46 -24.49 RSSI466 RSSI467 RSSI468 RSSI469 RSSI4610 RSSI4611
RX input47 -25.08 RSSI476 RSSI477 RSSI478 RSSI479 RSSI4710 RSSI4711
RX input48 -25.68 RSSI486 RSSI487 RSSI488 RSSI489 RSSI4810 RSSI4811
RX input49 -25.99 RSSI496 RSSI497 RSSI498 RSSI499 RSSI4910 RSSI4911
RX input50 -26.705 RSSI506 RSSI507 RSSI508 RSSI509 RSSI5010 RSSI5011
RX input51 -27.305 RSSI516 RSSI517 RSSI518 RSSI519 RSSI5110 RSSI5111
RX input52 -27.905 RSSI526 RSSI527 RSSI528 RSSI529 RSSI5210 RSSI5211
RX input53 -28.505 RSSI536 RSSI537 RSSI538 RSSI539 RSSI5310 RSSI5311
RX input54 -29.105 RSSI546 RSSI547 RSSI548 RSSI549 RSSI5410 RSSI5411
Tables 1 to 2
Description of tables 1-1 and 1-2: because of layout restrictions, Table 1 is divided into tables 1-1 and 1-2, that is, SOA1-SOA11 is divided into SOA1-SOA5 and SOA6-11 for arrangement, and thus "Table 1" is referred to hereinafter as tables 1-1 and 1-2.
The invention is realized by the following technical scheme, and the SOA current automatic control method integrated in the optical module comprises the following steps:
step S1: and setting an initial SOA amplification current and a corresponding threshold value thereof, if the optical signal received by the ROSA at the receiving end of the optical module is within the corresponding threshold value after the initial SOA amplification current, carrying out the next step, and if not, keeping the initial SOA amplification current to continuously monitor the input optical signal.
Since the optical signal amplifier SOA needs a current to start itself, that is, the power-on current of the SOA, the SOA can be started to operate, and therefore the current for starting the SOA is set as the initial SOA amplification current. The amplified current is used as the first amplification after the optical signal is received by the receiver ROSA, and when the optical signal received by the ROSA is within the threshold corresponding to the amplified current, the next step is carried out.
For example, referring to table 1, the horizontal bar SOA1-SOA11 indicates that SOA amplified current increases from left to right; the vertical marks RX input1-RX input54 represent actual optical signal sizes received by the optical module receiving end ROSA, and decrease from top to bottom in sequence; the RSSI represents the magnitude of an optical signal when an actual optical signal received by the ROSA at the receiving end of the optical module is amplified by SOA amplification current and then transmitted to the PD. Therefore, after the SOA current is determined, the actual optical signal received by the receiver ROSA can be obtained according to the optical signal obtained by the PD.
In table 1, when the SOA amplification current is fixed to a certain value, the smaller the RX input of the optical signal received by the receiving terminal ROSA, the smaller the RSSI, and thus the RSSI decreases from top to bottom in sequence; similarly, when the receiving end ROSA fixedly receives a certain optical signal RX input, the SOA amplification current is adjusted, and the RSSI is also increased when the SOA amplification current is increased, so that the RSSI is sequentially increased from left to right.
However, it should be noted that, in this embodiment, by way of example, 11 sets of SOAs are provided, and 54 sets of RX input optical signals are marked, and in actual use, the number of sets of SOAs and the size thereof are not limited, and the number of sets of RX input optical signals is also not limited.
It is assumed that the present embodiment sets the initial SOA amplification current to the SOA7, that is, sets a current of 84.26mA as the power-on start current of the optical signal amplifier SOA. And correspondingly setting the threshold value of the initial SOA amplification current SOA7 to be RSSI 447. When the current RX input received by the receiver ROSA is amplified by the SOA7, and is within the RSSI447, the next step is performed.
The current RX input is amplified by the SOA7 and then is larger than the RSSI447, and if an optical signal transmitted from a remote end is attenuated by optical fiber transmission, reaches the local optical module and is amplified by the SOA, the optical signal is smaller than the optical signal corresponding to the SOA power-on current, which indicates that the current optical signal is too small, and even if the current optical signal is amplified, the effect of no error code cannot be achieved, so the current optical signal is not directly processed, but the initial SOA amplification current is maintained, and the change of the receiver ROSA input optical signal is continuously monitored.
Step S2: setting a plurality of groups of SOA target currents, wherein the initial SOA amplified current is any one of the plurality of groups of SOA target currents; and correspondingly setting a group of RSSI target threshold ranges for each group of SOA target currents, judging whether the optical signals received by the ROSA at the receiving end of the optical module are within the RSSI target threshold range corresponding to the initial SOA amplified current after the optical signals are subjected to the initial SOA amplified current, if not, adjusting to the adjacent group of SOA target currents until the optical signals received by the ROSA at the receiving end of the optical module are within the RSSI target threshold range corresponding to the group of SOA target currents after the optical signals are subjected to the SOA target current amplification.
As mentioned in the foregoing, the PD of each optical module has a fixed range of sensitivity, and the maximum bit error rate that the system can tolerate can be satisfied only when the PD receives an optical signal within its sensitivity range. Therefore, please refer to table 1 again, after the optical signal received by the optical module receiving end ROSA is amplified by the initial SOA, the optical signal is within the threshold corresponding to the initial SOA amplification current, that is, the RSSI of the optical signal RX input received by the optical module receiving end ROSA after being amplified by the SOA7 is within the threshold RSSI 447. Then it is further determined whether the amplified RSSI is within the target threshold range of RSSI corresponding to SOA7 because the amplified RSSI is within the sensitivity range for PD reception only if it is within the target threshold range of RSSI corresponding to SOA amplification current set at that time.
For example, the sensitivity signal that can be received by the optical module PD has a size range of RSSI327-RSSI357, and at this time, after receiving the optical signal, the receiving end PD amplifies the optical signal by the initial SOA amplification current, and the obtained signal size is RSSI347, and is within the threshold RSSI 447. Whether the RSSI347 is within the sensitivity range of the optical module PD is further judged, and the RSSI347 is found within the size range of the sensitivity signal through table lookup.
Therefore, when the initial SOA amplification current is set, the RSSI target threshold range corresponding to the initial SOA amplification current is set, and if the RSSI is within the RSSI target threshold range corresponding to the RSSI after the initial SOA amplification current is amplified, the RSSI is directly output to the PD to serve as subsequent response processing. If the RSSI is not in the corresponding RSSI target threshold range, the adjustment of the magnitude of the SOA amplification current is needed, so that the RSSI can be in the RSSI target threshold range corresponding to the adjusted SOA amplification current, and the maximum bit error rate tolerable by the system can be met. Then in this example, the RSSI target threshold range corresponding to the initial SOA amplification current may be set to RSSI327-RSSI 357.
However, if the optical signal received by the receiver ROSA is amplified by the initial SOA amplification current, and then is within the threshold corresponding to the initial SOA amplification current, but is not within the RSSI target threshold corresponding to the initial SOA amplification current, the magnitude of the initial SOA amplification current needs to be adjusted, that is, multiple sets of SOA target currents are set. Obviously, the initial SOA amplification current is any one of a plurality of sets of SOA target currents, for example, in the foregoing example, the 7 th set of SOA target currents (i.e., the SOA 7) is used as the initial SOA amplification current and also used as the power-on current of the optical signal amplifier SOA, so that the initial SOA amplification current is started to operate.
As is known in the foregoing, the initial SOA amplification current is correspondingly provided with an RSSI target threshold range, and is used to determine whether a far-end optical signal received by the receiving end ROSA can be received within the sensitivity range of the PD after being amplified by the initial SOA amplification current. Therefore, in the set multiple sets of SOA target currents, each set of SOA target currents also needs to set a corresponding RSSI target threshold current, and is also used for determining whether a remote optical signal received by the receiver ROSA can be received within the sensitivity range of the PD after being amplified by the SOA target current.
Therefore, each set of RSSI target threshold current has an RSSI target upper threshold and an RSSI target lower threshold, such as RSSI327 being the RSSI target upper threshold of the initial SOA amplification current and RSSI357 being the RSSI target lower threshold of the initial SOA amplification current.
If the RSSI obtained after the remote optical signal is amplified by the initial SOA target current is larger than the RSSI327, the initial SOA amplification current is adjusted to the SOA target current of the previous group, that is, the SOA7 is adjusted to the SOA6, because if the RSSI is larger than the RSSI327, the amplification degree of the remote optical signal is too large, which exceeds the sensitivity receiving range of the PD.
Knowing that the target threshold current range of the RSSI corresponding to the SOA6 is RSSI316-RSSI336, after the RSSI is adjusted to SOA6, judging whether the RSSI is in the RSSI316-RSSI336 range after being amplified by the SOA6, if so, indicating that the RSSI is in the sensitivity receiving range of the PD after the remote optical signal is amplified by the SOA6, and directly outputting the RSSI to the PD; if the RSSI is still greater than RSSI316, then SOA6 needs to be adjusted again towards its previous set of SOA target currents, i.e. SOA6 is adjusted to SOA 5.
If the RSSI target threshold current range corresponding to the SOA5 is known to be RSSI295-RSSI325, after the RSSI target threshold current range is adjusted to be SOA5, whether the RSSI is in the RSSI295-RSSI325 range after being amplified by the SOA5 is judged, and if the RSSI is in the RSSI295-RSSI325 range, the RSSI is output to the PD; if the RSSI is still greater than RSSI296 then SOA5 needs to be adjusted again towards its previous set of SOA target currents, i.e. SOA5 is adjusted to SOA 4. It is easy to understand that when the SOA is adjusted in the scheme, the adjustment is in a stepwise manner, only one group of SOA target currents is adjusted forward each time, then the comparison and the judgment are continued until the far-end optical signal is amplified through the SOA target current adjusted this time, and the RSSI at this time is output within the RSSI target threshold range corresponding to the group of SOA target currents.
Similarly, if the RSSI obtained after the remote optical signal is amplified by the initial SOA target current is smaller than the RSSI357, the initial SOA amplification current is adjusted to the subsequent set of SOA target current, that is, the SOA7 is adjusted to the SOA8, because if the RSSI is smaller than the RSSI357, it indicates that the amplification degree of the remote optical signal is too small and is not in the PD sensitivity receiving range.
Knowing that the target threshold current range of the RSSI corresponding to the SOA8 is RSSI348-RSSI368, adjusting the target threshold current range to SOA8, judging whether the RSSI is in the RSSI338-RSSI368 range after being amplified by the SOA8, if so, indicating that the remote optical signal is in the sensitivity receiving range of the PD after being amplified by the SOA8, and directly outputting the RSSI to the PD; if the RSSI is still less than the RSSI368, then the SOA8 needs to be adjusted to its subsequent set of SOA target currents, i.e., SOA8 is adjusted to SOA 9.
If the RSSI target threshold current range corresponding to the SOA9 is known to be RSSI359-RSSI379, after the RSSI target threshold current range is adjusted to be SOA9, whether the RSSI is within the RSSI359-RSSI379 range after being amplified by the SOA9 is judged, and if the RSSI is within the RSSI379 range, the RSSI is output to the PD; if the RSSI is still less than the RSSI379, then the SOA9 needs to be adjusted again to its subsequent set of SOA target currents, i.e. SOA9 is adjusted to SOA 10. It is easy to understand that when the SOA is adjusted in the scheme, the adjustment is in a stepwise manner, only one group of SOA target currents is adjusted backwards each time, then the comparison and the judgment are continued until the far-end optical signal is amplified through the SOA target current adjusted this time, and the RSSI at this time is output within the RSSI target threshold range corresponding to the group of SOA target currents.
More optimally, 11 sets of SOA target currents are set in the embodiment, the SOA11 is a set with the largest adjustment amplitude for the far-end optical signal, and in the process of adjusting the SOA target current, if the SOA target current is adjusted to the SOA11 and the RSSI is still smaller than the RSSI target lower limit threshold corresponding to the SOA11, the output of the RSSI at this time is discarded, because the far-end optical signal is amplified to the maximum extent by the local optical module optical signal amplifier SOA and is not within the PD sensitivity range, it is indicated that the far-end optical signal at this time is invalid, and even if the far-end optical signal is amplified, the maximum bit error rate which can be tolerated by the system cannot be met, so that the target current of the last set of SOA is adjusted back to the initial SOA amplification current to continuously monitor the input optical signal.
However, if the SOA target current is adjusted to the SOA1, but the RSSI is still greater than the RSSI target upper limit threshold corresponding to the SOA1, the output of the RSSI at this time is not directly discarded. In practical situations, although the PD of the optical module is burned out if the PD receives an excessive RSSI signal, the existing optical module has a safety function, and when a voltage signal exceeds an upper limit of the PD, the PD is directly disconnected to perform a protection function. Since the PD receiving ranges of different optical modules may be different, when the optical module leaves the factory, a PD protection mechanism is already set, and when the scheme is applied, the RSSI upper limit received by the PD does not need to be limited.
As a further optimization, the RSSI target lower threshold of the previous set of SOA target currents is smaller than the RSSI target upper threshold of the next set of SOA target currents.
As mentioned above, when the receiving end ROSA receives a certain fixed optical signal RX input, the higher the SOA target current is, the greater the amplification degree of RX input is, and the greater the obtained RSSI is. That is, as shown in table 1, assuming that the optical signal RX input17 is now received, the RSSI obtained when the SOA target current is SOA2 is larger than the RSSI obtained when the SOA target current is SOA 1. However, in table 1, the RSSI of the whole column corresponding to the SOA2 is not larger than the RSSI of the whole column corresponding to the SOA1, and therefore, when setting the RSSI target threshold range corresponding to the SOA target current of each group, the RSSI target threshold ranges of two adjacent groups need to be partially crossed.
If the RSSI target lower limit threshold of the previous group of SOA target currents is equal to or greater than the RSSI target upper limit threshold of the next group of SOA target currents, the two adjacent groups of the RSSI target currents are likely to jump all the time when judging whether the RSSI is within the RSSI target threshold range, and the RSSI cannot be accurately divided into a certain group of RSSI target threshold range, so that the SOA target currents are also caused to jump all the time.
For example, the RSSI171 of the SOA1 is equal to the RSSI162 of the SOA2, that is, the RSSI171= RSSI162, and when the SOA target current is adjusted to SOA2, the RSSI is also exactly equal to the RSSI162, that is, the RSSI = RSSI162= RSSI171, then it cannot be distinguished whether the RSSI needs to be divided in the SOA2 or the SOA1, because when the RSSI reaches the RSSI target edge threshold corresponding to any SOA target current, the SOA target current is adjusted, so the optical signal amplifier SOA is continuously jittered between the SOA1 and the SOA 2.
Similarly, if the RSSI171 of the SOA1 is larger than the RSSI162 of the SOA2, that is, the RSSI171> the RSSI162, then there is still a gap in the values of the partial RSSI between the RSSI171 and the RSSI162, and if the RSSI is just smaller than the RSSI171 but larger than the RSSI162, that is, the RSSI171> the RSSI162, then it cannot be determined whether the RSSI needs to be divided into the SOA2 or the SOA1, because the RSSI does not belong to the RSSI target threshold range corresponding to the SOA2 nor the RSSI target threshold range corresponding to the SOA 1.
Therefore, a plurality of groups of SOA target currents are sequentially arranged from left to right in the order from small to large, and RSSI target thresholds corresponding to each group of SOA target currents are also sequentially arranged from left to right in the order from small to large, so that the schematic diagram shown in fig. 2 is formed.
Setting the RSSI target threshold range of each group in a manner that the RSSI target lower threshold of the previous group of SOAs is smaller than the RSSI target upper threshold of the next group of SOAs, for example, when the SOA target current is adjusted to the SOA2, the RSSI is slightly smaller than the RSSI162, and the RSSI is divided into the SOAs 2. Even if the RSSI is equal to the RSSI162, the RSSI already reaches the RSSI target upper limit edge threshold corresponding to the SOA2, so that the RSSI jumps from the SOA2 to the SOA1, but after the RSSI is adjusted to the SOA1, the RSSI is larger than the RSSI171, so that the RSSI is divided into the SOA1, and the situation that the SOA2 and the SOA1 jump mutually does not occur.
The present scheme further provides an SOA current automatic control system integrated in an optical module, as shown in fig. 3, including:
the receiving end ROSA is used for receiving an optical signal transmitted by the optical module at the far end through the optical fiber;
the optical signal amplifier SOA is used for amplifying an optical signal from a receiving end ROSA receiving end, judging whether the amplified optical signal is in the sensitivity range of the receiver PD, if so, outputting the amplified optical signal to the receiver PD, otherwise, continuously monitoring the input optical signal;
the receiver PD is used for receiving the optical signal amplified by the optical signal amplifier SOA;
the processor is used for calculating an actual optical signal received by the receiver ROSA according to the optical signal received by the receiver PD and the SOA target current of the optical signal amplifier SOA;
and the adjustable power supply module is used for outputting adjustable current to the optical signal amplifier SOA, wherein the adjustable current comprises initial SOA amplified current and a plurality of groups of SOA target currents, and the initial SOA amplified current is any one of the plurality of groups of SOA target currents.
In addition, the present solution only assumes one channel of the present optical module, and actually, one optical module may have multiple channels, and the control methods thereof are the same, and therefore are not described herein.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An SOA current automatic control method integrated in an optical module is characterized in that: the method comprises the following steps:
step S1: setting an initial SOA amplification current and a corresponding threshold value thereof, if an optical signal received by an optical module receiving end ROSA is within the corresponding threshold value after the initial SOA amplification current, carrying out the next step, otherwise, keeping the initial SOA amplification current to continuously monitor the input optical signal;
step S2: setting a plurality of groups of SOA target currents, wherein the initial SOA amplified current is any one of the plurality of groups of SOA target currents; and correspondingly setting a group of RSSI target threshold value ranges for each group of SOA target currents, judging whether the optical signals received by the ROSA at the receiving end of the optical module are within the RSSI target threshold value range corresponding to the initial SOA amplified current after the optical signals are subjected to the initial SOA amplified current, if not, adjusting to the adjacent group of SOA target currents until the optical signals received by the ROSA at the receiving end of the optical module are within the RSSI target threshold value range corresponding to the group of SOA target currents after the optical signals are subjected to the SOA target current amplification, and outputting the amplified signals to the receiver PD.
2. The method according to claim 1, wherein the method comprises the following steps: and the RSSI target upper limit threshold corresponding to the same group of SOA target currents is larger than the RSSI target lower limit threshold corresponding to the group of SOA target currents.
3. The method according to claim 2, wherein the method comprises the following steps: and arranging a plurality of groups of SOA target currents in a descending order, wherein the RSSI target upper limit threshold of the next group of SOA target currents is larger than the RSSI target lower limit threshold of the previous group of SOA target currents but smaller than the RSSI target upper limit threshold of the previous group of SOA target currents.
4. The method according to claim 3, wherein the method comprises the following steps: when an optical signal received by an optical module receiving end ROSA is amplified by an initial SOA and then is larger than an RSSI target upper limit threshold value corresponding to the initial SOA amplified current, the initial SOA amplified current is adjusted to a group of SOA target currents before the initial SOA amplified current;
when the optical signal received by the receiver ROSA of the optical module is amplified by the initial SOA and then is smaller than the RSSI target lower limit threshold corresponding to the initial SOA amplified current, the initial SOA amplified current is adjusted to a group of SOA target currents behind the initial amplified current.
5. The method according to claim 1, wherein the method comprises the following steps: and setting the initial SOA amplification current as an intermediate group in the plurality of groups of SOA target currents.
6. The method according to claim 3, wherein the method comprises the following steps: and when the optical signal received by the receiver ROSA of the optical module is amplified by the last group of SOA target currents and is still smaller than the RSSI target lower limit threshold corresponding to the last group of SOA target currents, adjusting the last group of SOA target currents back to the initial SOA amplified current so as to continuously monitor the input optical signal.
7. An SOA current automatic control system integrated in an optical module is characterized in that: the method comprises the following steps:
the receiving end ROSA is used for receiving an optical signal transmitted by the optical module at the far end through the optical fiber;
the optical signal amplifier SOA is used for amplifying an optical signal from a receiving end ROSA receiving end, judging whether the amplified optical signal is in the sensitivity range of the receiver PD, if so, outputting the amplified optical signal to the receiver PD, otherwise, continuously monitoring the input optical signal;
and the receiver PD is used for receiving the optical signal amplified by the optical signal amplifier SOA.
8. An SOA current automatic control system integrated in a light module according to claim 7, wherein: the optical signal receiving device further comprises a processor for calculating an actual optical signal received by the receiving end ROSA according to the optical signal received by the receiver PD and the SOA target current of the optical signal amplifier SOA.
9. An SOA current automatic control system integrated in a light module according to claim 7, wherein: the optical signal amplifier SOA further comprises an adjustable power supply module which is used for outputting adjustable current to the optical signal amplifier SOA, and the adjustable current comprises initial SOA amplification current.
10. An SOA current automatic control system integrated in a light module according to claim 9, wherein: the adjustable current further comprises a plurality of groups of SOA target currents, and the initial SOA amplified current is any one of the plurality of groups of SOA target currents.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150229411A1 (en) * 2014-02-13 2015-08-13 Fujitsu Optical Components Limited Optical reception apparatus, and control apparatus and control method of optical reception apparatus
CN108063638A (en) * 2017-12-13 2018-05-22 武汉电信器件有限公司 A kind of highly sensitive optical receiver with light path defencive function and preparation method thereof
CN110081970A (en) * 2019-05-31 2019-08-02 武汉火石光电有限公司 A kind of receiver protector of band SOA module
CN209727258U (en) * 2019-05-31 2019-12-03 武汉火石光电有限公司 A kind of receiver protector of band SOA module
CN112311472A (en) * 2020-12-21 2021-02-02 深圳市迅特通信技术股份有限公司 Optical module receiving device, control method and storage medium

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150229411A1 (en) * 2014-02-13 2015-08-13 Fujitsu Optical Components Limited Optical reception apparatus, and control apparatus and control method of optical reception apparatus
CN108063638A (en) * 2017-12-13 2018-05-22 武汉电信器件有限公司 A kind of highly sensitive optical receiver with light path defencive function and preparation method thereof
CN110081970A (en) * 2019-05-31 2019-08-02 武汉火石光电有限公司 A kind of receiver protector of band SOA module
CN209727258U (en) * 2019-05-31 2019-12-03 武汉火石光电有限公司 A kind of receiver protector of band SOA module
CN112311472A (en) * 2020-12-21 2021-02-02 深圳市迅特通信技术股份有限公司 Optical module receiving device, control method and storage medium

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李钱: "外腔锥形半导体激光技术研究", 《中国优秀硕士学位论文全文数据库 基础科学辑》 *

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