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Automatic bias calibrating method and devie for optical regulator of externally regulatable optic emitter

An optical modulator and automatic correction technology, which is applied in electromagnetic transmitters, electromagnetic wave transmission systems, electrical components, etc., can solve the problem that the bias voltage controller cannot provide compensation voltage, etc.

Inactive Publication Date: 2005-09-21
OCP ASIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when the temperature changes, it will generate extra voltage at the output terminal of the bias voltage controller, and these voltages will cause the bias voltage controller to fail to provide the correct compensation voltage to maintain the bias voltage of the optical modulator at Quad point on

Method used

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  • Automatic bias calibrating method and devie for optical regulator of externally regulatable optic emitter
  • Automatic bias calibrating method and devie for optical regulator of externally regulatable optic emitter
  • Automatic bias calibrating method and devie for optical regulator of externally regulatable optic emitter

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Embodiment Construction

[0037] The present invention uses a radio frequency switch to control the bias voltage controller of the optical modulator of the externally adjusted optical transmitter to measure the additional compensation voltage generated by the general bias controller for the various stages of circuits between its cycles due to temperature changes As well as the drift voltage and provide a DC bias voltage as compensation, so that the bias voltage of the optical modulator can fall on the correct bias point, and use the concept of cycle to achieve the function of automatic correction.

[0038] Please refer to Figure 5 , Figure 5It is an automatic correction device for the bias voltage of an optical modulator of an externally adjustable optical transmitter according to an embodiment of the present invention. This bias controller 538 is composed of a reference signal generator 502, a combination device 520, an optical coupling device 528, an optical receiver 530, a resistor 532, a radio f...

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Abstract

A method for correcting automatically the bias of the light modulator of the light emitter of externally adjusting type and the apparatus thereof makes the bias of the light modulator keep constant, steadies the output power of the light and obtains the effect of reducing the distortion during transmitting using the controlling system of the closed loop consisting of the reference signals generator, the light signals receiver, the two-rank signals generator, the two-rank signals detector, the DC amplifier and the automated temperature correcting device. This invention can also avoid the additional distortion of the transmitted signals resulting from the change of the output of the light due to the variations of the environment and the temperature.

Description

technical field [0001] The present invention relates to a bias voltage control technology and device for an optical modulator of an externally adjustable optical transmitter, and in particular to a bias controller for an optical modulator of an externally adjustable optical transmitter Automatic correction technology and its device. Background technique [0002] In recent years, the world's optical fiber communication has developed vigorously, especially the Internet and cable TV. Attracted by the huge business opportunities in the user market, optical fiber communication companies are all looking for longer optical fiber transmission distance, larger bandwidth, and more Good quality requires development. Please refer to figure 1 , because the optical fiber transmitter 110 with a wavelength of 1550nm has low distortion, low insertion loss and can be matched with an optical amplifier 120 and an optical receiver 130 to form a long-distance high-quality transmission network. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/58
Inventor 林明忠许祐豪高志荣
Owner OCP ASIA