CN201336666Y - Optical receiver - Google Patents
Optical receiver Download PDFInfo
- Publication number
- CN201336666Y CN201336666Y CNU2009203000760U CN200920300076U CN201336666Y CN 201336666 Y CN201336666 Y CN 201336666Y CN U2009203000760 U CNU2009203000760 U CN U2009203000760U CN 200920300076 U CN200920300076 U CN 200920300076U CN 201336666 Y CN201336666 Y CN 201336666Y
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- electrically
- control unit
- optical
- optical power
- amplifier
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Abstract
The utility model relates to an optical receiver, in particular to an optical receiver used for a user-terminal general analog community antenna television (CATV) in an optical access network, which comprises an amplifier and an electrically-tuned attenuator. An optical power signal is divided into two paths by a photoelectric conversion tube, wherein the first path is connected with the electrically-tuned attenuator through the amplifier, and the second path is connected with a mini control unit. The mini control unit is connected with the electrically-tuned attenuator of the first path, a display, an electrically-controlled equilibrium mode regulator and an electrically-controlled attenuation mode regulator respectively. The optical power signal in the second path is detected by the mini control unit, and then the detected signal is fed back to the electrically-tuned attenuator, and the electrically-controlled equilibrium mode regulator and the electrically-controlled attenuation mode regulator regulate the optical power signals according to the detection result of the mini control unit at the same time. The optical receiver keeps the output level unchanged when the input optical power changes within a certain dynamic range and ensures high gain and low distortion, and solves the technical problem that the output level is unstable in the prior art.
Description
Technical field
The utility model relates to a kind of optical receiver, relates in particular to a kind of optical receiver that is used for the universal simulation CATV of optical access network user side.
Background technology
In optical fiber communication, the wireless signal optical transmission, in the optical information transmission systems such as optical fiber cable TV/satellite television, the carrier wave optical receiver is an indispensable device, especially transmission of wireless signals, carrier wave optical receivers such as optical fiber cable TV/satellite television, to the output signal level amplitude, linearity etc. more have strict requirement.In the wireless signal optical transmission, during optical fiber cable TV/satellite TV system was used, optical receiver must have good broad band multicarrier characteristic and sufficiently high dynamic range, so that can transmit television channel as much as possible and adapt to different transmission ranges.Generally all comprise optical-electrical converter, amplifier group, electrically controlled attenuator and automatic gain control circuit in the existing optical receiver, as Chinese patent: as described in " optical receiver (CN201063634Y) ", comprising above-mentioned device, and between the control end of the output of automatic gain control circuit and first order electrically controlled attenuator, be provided with delay circuit.
Summary of the invention
The utility model mainly provides a kind of input optical power when changing in certain dynamic range, and output level remains unchanged, and the low optical receiver of high distortion gains; Solve the jiggly technical problem of existing in prior technology output level.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: a kind of optical receiver, comprise amplifier and electrically controlled attenuator, optical power signals is divided into two-way by photoelectric conversion tube, the first via is connected with electrically controlled attenuator by amplifier, and electrically controlled attenuator is connected with main radio frequency output after by one-level amplifier and two-stage amplifier and radio frequency testing is exported; The second tunnel optical power signals is connected with miniature control unit, and miniature control unit is connected with electrically controlled attenuator, display, automatically controlled balanced mode adjuster and the automatically controlled evanescent mode adjuster of the first via respectively; Signal feedback after optical power signals in the second tunnel detects by miniature control unit is given electrically controlled attenuator, and automatically controlled balanced mode adjuster and automatically controlled evanescent mode adjuster are adjusted optical power signals according to the testing result of miniature control unit simultaneously.When optical receiver received luminous power, output level was divided into two-way one tunnel and advances miniature control unit (MCU), and other one the tunnel at main road.MCU detects the size of input optical power, size according to input optical power, MCU transmits a signal to electrically controlled attenuator (AGC) and controls its attenuation, make it to reach the output level requirement of original setting, partly take a sample at the level output interface in addition, detect output level to CPU, make it the output level of correct display device.Control by MCU make the luminous power of input-8dBm～+ when changing in the scope of 2dBm, output level remains unchanged.Simultaneously can show parameters, easy to operate stable performance directly perceived.
As preferably, the amplifier of described electrically controlled attenuator front end is a GaAs single-chip microwave integration circuit.The described first order and second level amplifier are the paster GaAs device.Adopt GaAs amplifying device, PD output, gain is high, distortion is low.
As preferably, described input optical power is-8dBm～+ 2dBm, the adjustable range of automatically controlled balanced mode adjuster is 0～10dB, the adjustable range of described automatically controlled evanescent mode adjuster is 0～20dB μ V.
As preferably, be reserved with the RS232 network management interface on the described miniature control unit.Reserve 232 interfaces, can remote live detect the operating state of ray machine and the parameters such as output level of ray machine are set by webmastering software.
Therefore, a kind of optical receiver of the present utility model has following advantage: 1, utilize miniature control unit that input signal is tested, with result feedback, thus make input optical power-8dBm～+ during 2dBm, output level remains unchanged; 2, Single-chip Controlling complete machine work, the digital parameters that shows, easy to operate directly perceived, stable performance; 3, GaAs amplifying device, PD output, gain is high, distortion is low; 4, on miniature control unit, be reserved with network management interface, can realize Long-distance Control, make to monitor that control is more convenient.
Description of drawings:
Fig. 1 is the circuit block diagram of a kind of optical receiver of the present utility model.
Embodiment:
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment:
As shown in Figure 1, a kind of optical receiver, in the input light frequency be-8dBm～+ during 2dBm, luminous power 1 signal is divided into two-way by the PIN photoelectric conversion tube 2 of high-responsivity, the first via is connected with electrically controlled attenuator 4 by amplifier 3, and electrically controlled attenuator 4 is connected with main radio frequency after by one-level amplifier 5 and two-stage amplifier 8 and exports 9 radio frequency testings output 11; The second tunnel optical power signals is connected with miniature control unit MCU, miniature control unit MCU is connected with electrically controlled attenuator 4, display 13, switch 12, automatically controlled balanced mode adjuster 6 and the automatically controlled evanescent mode adjuster 7 of the first via respectively, and is reserved with the network management interface 10 of RS232 on MCU; Signal feedback after optical power signals in the second tunnel detects by miniature control unit MCU is given electrically controlled attenuator 4, simultaneously by regulating automatically controlled balanced mode adjuster 6 and automatically controlled evanescent mode adjuster 7 is adjusted attenuation and equilibrium quantity, to reach the level of required output.The adjustable range of wherein automatically controlled balanced mode adjuster is 0～10dB, and the adjustable range of described automatically controlled evanescent mode adjuster is 0～20dB μ V.Partly take a sample at the level output interface in addition, detect output level, make it the output level of correct display device to MCU.
Claims (5)
1. optical receiver, comprise amplifier and electrically controlled attenuator, it is characterized in that: optical power signals is divided into two-way by photoelectric conversion tube, the first via is connected with electrically controlled attenuator by amplifier, and electrically controlled attenuator is connected with main radio frequency output after by one-level amplifier and two-stage amplifier and radio frequency testing is exported; The second tunnel optical power signals is connected with miniature control unit, and miniature control unit is connected with electrically controlled attenuator, display, automatically controlled balanced mode adjuster and the automatically controlled evanescent mode adjuster of the first via respectively; Signal feedback after optical power signals in the second tunnel detects by miniature control unit is given electrically controlled attenuator, and automatically controlled balanced mode adjuster and automatically controlled evanescent mode adjuster are adjusted optical power signals according to the testing result of miniature control unit simultaneously.
2. a kind of optical receiver according to claim 1 is characterized in that: the amplifier of described electrically controlled attenuator front end is a GaAs single-chip microwave integration circuit.
3. a kind of optical receiver according to claim 1 is characterized in that: the described first order and second level amplifier are the paster GaAs device.
4. according to claim 1 or 2 or 3 described a kind of optical receivers, it is characterized in that: described input optical power be 8dBm～+ 2dBm, the adjustable range of automatically controlled balanced mode adjuster is 0～10dB, and the adjustable range of described automatically controlled evanescent mode adjuster is 0～20dB μ V.
5. according to claim 1 or 2 or 3 described a kind of optical receivers, it is characterized in that: be reserved with the RS232 network management interface on the described miniature control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009203000760U CN201336666Y (en) | 2009-01-06 | 2009-01-06 | Optical receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009203000760U CN201336666Y (en) | 2009-01-06 | 2009-01-06 | Optical receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201336666Y true CN201336666Y (en) | 2009-10-28 |
Family
ID=41288330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009203000760U Expired - Lifetime CN201336666Y (en) | 2009-01-06 | 2009-01-06 | Optical receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201336666Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178893A (en) * | 2011-12-21 | 2013-06-26 | 韩国电子通信研究院 | Multi-channel wave beam scanning receiving machine |
| CN104242965A (en) * | 2013-06-10 | 2014-12-24 | 三星电机株式会社 | Module and method for receiving RF signal |
| CN106972892A (en) * | 2017-05-05 | 2017-07-21 | 深圳市凯利华电子有限公司 | A kind of novel C ATV optical fiber and digitals television reception thermomechanical components |
| CN111193553A (en) * | 2020-03-04 | 2020-05-22 | 中国电子科技集团公司第三十四研究所 | Light path insertion loss self-adaptive radio frequency optical receiver |
-
2009
- 2009-01-06 CN CNU2009203000760U patent/CN201336666Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178893A (en) * | 2011-12-21 | 2013-06-26 | 韩国电子通信研究院 | Multi-channel wave beam scanning receiving machine |
| CN104242965A (en) * | 2013-06-10 | 2014-12-24 | 三星电机株式会社 | Module and method for receiving RF signal |
| CN106972892A (en) * | 2017-05-05 | 2017-07-21 | 深圳市凯利华电子有限公司 | A kind of novel C ATV optical fiber and digitals television reception thermomechanical components |
| CN111193553A (en) * | 2020-03-04 | 2020-05-22 | 中国电子科技集团公司第三十四研究所 | Light path insertion loss self-adaptive radio frequency optical receiver |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Hangzhou City, Zhejiang province 311241 Xiaoshan Guali Industrial Development Zone Patentee after: Hangzhou Prevail Optoelectronic Equipment Co., Ltd. Address before: Hangzhou City, Zhejiang province 311241 Xiaoshan Guali Industrial Development Zone Patentee before: Hangzhou Prevail Optoelectronic Equipment Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091028 |