JPS5524683A - Optical signal monitor - Google Patents

Optical signal monitor

Info

Publication number
JPS5524683A
JPS5524683A JP9857078A JP9857078A JPS5524683A JP S5524683 A JPS5524683 A JP S5524683A JP 9857078 A JP9857078 A JP 9857078A JP 9857078 A JP9857078 A JP 9857078A JP S5524683 A JPS5524683 A JP S5524683A
Authority
JP
Japan
Prior art keywords
circuit
sampling
time axis
optically
amplified
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP9857078A
Other languages
Japanese (ja)
Other versions
JPS6019443B2 (en
Inventor
Kozo Uchida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Iwatsu Electric Co Ltd
Original Assignee
Iwatsu Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Priority to JP53098570A priority Critical patent/JPS6019443B2/en
Priority to US06/065,502 priority patent/US4289399A/en
Publication of JPS5524683A publication Critical patent/JPS5524683A/en
Publication of JPS6019443B2 publication Critical patent/JPS6019443B2/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/67—Optical arrangements in the receiver
    • 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
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/67—Optical arrangements in the receiver
    • H04B10/671—Optical arrangements in the receiver for controlling the input optical signal
    • H04B10/672—Optical arrangements in the receiver for controlling the input optical signal for controlling the power of the input optical signal
    • H04B10/674—Optical arrangements in the receiver for controlling the input optical signal for controlling the power of the input optical signal using a variable optical attenuator

Abstract

PURPOSE:To improve the performance by using optically interrupting means, an amplifying device and a time axis circuit. CONSTITUTION:A rotary disc 4 formed with a hole 5 acting as optically interrupting means is interposed between a fiber 1 and a lens 3. With a light receiving element 11, there are connected a sampling circuit 10a, which is composed of a sampling head 14, an AC amplifier 20, a rectifying circuit 23, resistors 31, 37 and 38 and an attenuator 39, an amplifying device 10, which is equipped with a switch 30, a buffer amplifier 35 and a capacitor 32, and a time axis circuit 44. As a result, when no light 2 is incident upon the element 11, the switch 30 is turned on in response to the signal from a control circuit 9 thereby to constitute a negative feedback leading from an output terminal 24 to an input terminal 15 so that the voltage, which is generated in a resistor 13, and the offset voltage of the sampling circuit 10a are amplified by the dark current of the element 11 and are impressed upon a buffer amplifier 35. The voltages are inverte and amplified and are negatively fed back so that the drift caused by the fluctuations in the dark current and the offset voltage is eliminated. Moreover, a zero level is generated at the output terminal 24 by the sampling command pulses from the time axis circuit 44.
JP53098570A 1978-08-12 1978-08-12 Optical signal observation device Expired JPS6019443B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP53098570A JPS6019443B2 (en) 1978-08-12 1978-08-12 Optical signal observation device
US06/065,502 US4289399A (en) 1978-08-12 1979-08-10 Light signal observation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53098570A JPS6019443B2 (en) 1978-08-12 1978-08-12 Optical signal observation device

Publications (2)

Publication Number Publication Date
JPS5524683A true JPS5524683A (en) 1980-02-21
JPS6019443B2 JPS6019443B2 (en) 1985-05-16

Family

ID=14223328

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53098570A Expired JPS6019443B2 (en) 1978-08-12 1978-08-12 Optical signal observation device

Country Status (1)

Country Link
JP (1) JPS6019443B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH049745U (en) * 1990-05-11 1992-01-28
JP2011169842A (en) * 2010-02-22 2011-09-01 Seiko Epson Corp Flicker measuring method and device thereof

Also Published As

Publication number Publication date
JPS6019443B2 (en) 1985-05-16

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