ATE275304T1 - BIASING SYSTEM FOR A DUAL OUTPUT OPTICAL MODULATOR - Google Patents
BIASING SYSTEM FOR A DUAL OUTPUT OPTICAL MODULATORInfo
- Publication number
- ATE275304T1 ATE275304T1 AT99203833T AT99203833T ATE275304T1 AT E275304 T1 ATE275304 T1 AT E275304T1 AT 99203833 T AT99203833 T AT 99203833T AT 99203833 T AT99203833 T AT 99203833T AT E275304 T1 ATE275304 T1 AT E275304T1
- Authority
- AT
- Austria
- Prior art keywords
- signal
- fed
- pilot tone
- output
- adder
- Prior art date
Links
Landscapes
- Optical Communication System (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
An analogue signal, such as a broadband TV signal from a CATV system is input at 1. The signal is mixed with a pilot tone which has frequency well below the e lowest frequency in the signal. The signal is fed to an electro-optical modulator 7 which has two complementary outputs 11, 12. A portion of each of the two outputs is sampled at 10, 13. The second harmonic component of the pilot tone are extracted from the two samples and the two components are fed to algebraic adder 23 to produce a difference signal. The difference signal leaving the adder 23 is fed to analog multiplier 28, where the difference signal is compared with a signal from doubler 31 that is double the frequency of the pilot tone. The output of the multiplier is fed to differential amplifier 25 which compares the signal with the output of a bias reference signal 26. The output of amplifier 25 is fed to adder 24 where it is mixed with the pilot tone. The resultant signal is used to control the modulator 7. Effectively, the distortion of the pilot tone in the output is used to provide a pre-distortion in the modulator.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP98122483 | 1998-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ATE275304T1 true ATE275304T1 (en) | 2004-09-15 |
Family
ID=8233040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT99203833T ATE275304T1 (en) | 1998-11-27 | 1999-11-16 | BIASING SYSTEM FOR A DUAL OUTPUT OPTICAL MODULATOR |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JP2000162564A (en) |
| AR (1) | AR021409A1 (en) |
| AT (1) | ATE275304T1 (en) |
| AU (1) | AU6173899A (en) |
| BR (1) | BR9905750A (en) |
| CA (1) | CA2290763A1 (en) |
| DE (1) | DE69919818D1 (en) |
| NZ (1) | NZ501301A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI641881B (en) * | 2016-02-19 | 2018-11-21 | 光聯通訊有限公司 | An optical transmitter with mach-zehnder modulator and method for operating the same |
| JP7202100B2 (en) * | 2018-08-09 | 2023-01-11 | ミハル通信株式会社 | light modulator |
-
1999
- 1999-11-16 AT AT99203833T patent/ATE275304T1/en not_active IP Right Cessation
- 1999-11-16 DE DE69919818T patent/DE69919818D1/en not_active Expired - Lifetime
- 1999-11-25 CA CA 2290763 patent/CA2290763A1/en not_active Abandoned
- 1999-11-25 NZ NZ50130199A patent/NZ501301A/en unknown
- 1999-11-26 AU AU61738/99A patent/AU6173899A/en not_active Abandoned
- 1999-11-26 BR BR9905750-6A patent/BR9905750A/en not_active Application Discontinuation
- 1999-11-26 AR ARP990106031 patent/AR021409A1/en unknown
- 1999-11-29 JP JP11337512A patent/JP2000162564A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| NZ501301A (en) | 2000-03-27 |
| BR9905750A (en) | 2000-08-15 |
| CA2290763A1 (en) | 2000-05-27 |
| AR021409A1 (en) | 2002-07-17 |
| AU6173899A (en) | 2000-06-01 |
| JP2000162564A (en) | 2000-06-16 |
| DE69919818D1 (en) | 2004-10-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69732562T2 (en) | Adaptive predistortion circuit for optical external modulation | |
| EP0612452B1 (en) | Apparatus for linearization of optic modulators using a feed-forward predistortion circuit | |
| US5210633A (en) | Apparatus and method for linearizing the operation of an external optical modulator | |
| KR100337706B1 (en) | An active frequency amplifier, integrated circuit, distortion generating circuit and its distortion reduction method with improved CTB and intermodulation characteristics | |
| JPH0652816B2 (en) | Distortion correction method and correction circuit thereof | |
| AU6340000A (en) | Method and apparatus for linearizing an amplifier | |
| WO1999012264A3 (en) | Sigma-delta modulator with improved gain accuracy | |
| ATE137371T1 (en) | OPTICAL TRANSMITTERS, LINEARIZED BY PARAMETRIC FEEDBACK | |
| Canévet et al. | Group estimation of loudness in sound fields | |
| ATE275304T1 (en) | BIASING SYSTEM FOR A DUAL OUTPUT OPTICAL MODULATOR | |
| US4414686A (en) | Compensation of nonlinearities of transmission members in a radio relay system | |
| Macdonald | Nonlinear distortion reduction by complementary distortion | |
| US5132636A (en) | Triangular to sine wave converter | |
| GB2001495A (en) | Limiting audio signal peaks without distortion | |
| JPH0698197A (en) | Power amplification device for composite signal | |
| GB2305039A (en) | An improvement to amplifiers | |
| US11444819B1 (en) | Adaptive digital receiver path linearizer | |
| US5321325A (en) | Single input push-pull circuit | |
| NO903869L (en) | DEVICE AND PROCEDURE FOR REDUCING DISTORTION BY AN ANALOGUE, OPTICAL TRANSMISSION SYSTEM. | |
| Ranđelović et al. | New linearization technique for third-and fifth-order intermodulation products in multichannel amplifiers | |
| JPH047882A (en) | Semiconductor laser device | |
| Cordell | Phase intermodulation distortion instrumentation and measurements | |
| Talbot | A Review of Non-Linear Distortion Fundamentals | |
| JPS5382110A (en) | Compensating circuit for non-linearity | |
| US5925876A (en) | Optoelectronics circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RER | Ceased as to paragraph 5 lit. 3 law introducing patent treaties |