TW267275B - In-line predistorter for linearization of electronic and optical signals - Google Patents

In-line predistorter for linearization of electronic and optical signals

Info

Publication number
TW267275B
TW267275B TW084105966A TW84105966A TW267275B TW 267275 B TW267275 B TW 267275B TW 084105966 A TW084105966 A TW 084105966A TW 84105966 A TW84105966 A TW 84105966A TW 267275 B TW267275 B TW 267275B
Authority
TW
Taiwan
Prior art keywords
predistortion
distortion
line
real
component
Prior art date
Application number
TW084105966A
Other languages
Chinese (zh)
Inventor
A Blauvelt Henry
A Regehr Martin
Original Assignee
Ortel Corp
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
Priority claimed from PCT/US1995/006352 external-priority patent/WO1995032561A1/en
Application filed by Ortel Corp filed Critical Ortel Corp
Application granted granted Critical
Publication of TW267275B publication Critical patent/TW267275B/en

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  • Optical Communication System (AREA)
  • Networks Using Active Elements (AREA)
  • Filters And Equalizers (AREA)

Abstract

An electronic circuit provides a linear output from a nonlinear transmission device such as a laser. Second and higher order distortion of the nonlinear device is compensated by applying a predistorted signal equal in magnitude and opposite in sign to the real and imaginary components of distortion produced by the nonlinear device. The input signal for the nonlinear device is applied to an in-line electrical path coupled to the nonlinear device. The in-line path contains at least one component for generating primarily real components of distortion. In some applications, at least one component for generating imaginary components of distortion is located on the in-line path. Filter stages are used to provide frequency dependent predistortion. In a preferred embodiment, an attenuator, a MMIC amplifier, a CATV hybrid amplifier, and a varactor in line with a semiconductor laser, provide the predistorted signal. In another embodiment, the real component of predistortion is generated by a FET configured as a voltage controlled resistor. In still another embodiment, the real component of predistortion is generated by the parallel combination of a diode and a resistor connected in series with the RF signal path. Also provided is a separate circuit including antiparallel diodes and reactive elements for generating frequency dependent third-order predistortion.
TW084105966A 1994-05-19 1995-06-12 In-line predistorter for linearization of electronic and optical signals TW267275B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US24587894A 1994-05-19 1994-05-19
PCT/US1995/006352 WO1995032561A1 (en) 1994-05-19 1995-05-19 In-line predistorter for linearization of electronic and optical signals

Publications (1)

Publication Number Publication Date
TW267275B true TW267275B (en) 1996-01-01

Family

ID=51452931

Family Applications (1)

Application Number Title Priority Date Filing Date
TW084105966A TW267275B (en) 1994-05-19 1995-06-12 In-line predistorter for linearization of electronic and optical signals

Country Status (1)

Country Link
TW (1) TW267275B (en)

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