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Coaxial direct-adjusting laser coupling drive circuit

A laser and direct adjustment technology, which is applied to lasers, laser components, semiconductor lasers, etc., can solve the problems of adjustment of specific parameters of the coupling drive circuit, poor productivity, etc., and achieve productivity, reduced impedance impact, and return resistance change effect

Active Publication Date: 2009-01-21
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing drive coupling circuit has the following disadvantages: for different manufacturers and different batches of lasers, due to design differences or discrete production, the input impedance of the lasers is different, and the specific parameters of the coupling drive circuit (such as resistance resistance and capacitance) value) need to be adjusted; the laser drive circuits recommended by different manufacturers are different, and the productivity is poor when using lasers supplied by multiple suppliers

Method used

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  • Coaxial direct-adjusting laser coupling drive circuit
  • Coaxial direct-adjusting laser coupling drive circuit
  • Coaxial direct-adjusting laser coupling drive circuit

Examples

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Effect test

no. 1 example

[0027] Such as Figure 5 As shown, the driver 1 of this embodiment adopts ADN2841, and the coaxial direct modulation laser 6 is Sumitomo SLT4466CS. In addition, the matching resistor 2 is a 20-25 ohm resistor; the matching resistor 3 is a 50-200 ohm resistor; the capacitor 4 is a 0.5-5pF capacitor; the series resistor 5 is a 5-15 ohm resistor; the pull-up resistor 11 is a 20-25 ohm resistor ; The return capacitor 12 is a plurality of capacitors between 100pF~10uF.

[0028] The specific connection relationship is as follows:

[0029] The inverting output of ADN2841 adopts matching resistor 2, which is directly matched to VCC;

[0030] The positive phase output terminal of ADN2841 is connected to the negative pole of SLT4466CS through series resistor 5;

[0031] The non-inverting output of ADN2841 is connected to VCC through pull-up resistor 11, and connected to VCC through snubber network 3 and 4;

[0032] The positive pole of SLT4466CS is connected to VCC, and the negative...

no. 2 example

[0035] This example Image 6 As shown, the driver uses ADN2841, and the coaxial direct modulation laser is AOI's coaxial direct modulation laser DFB-1XXX-C5-2-2.5-LC-A-C-I-ZT2. In addition, among them, the matching resistor 2 is a 20-25 ohm resistor; the matching resistor 3 is a 50-200 ohm resistor; the capacitor 4 is a 0.5-4pF capacitor; the series resistor 5 is a 5-15 ohm resistor; 7 is a high-frequency magnetic resistance; 8 is a 20-25 ohm resistor; 9 is a plurality of capacitors with values ​​between 100pF-10uF.

[0036] The specific connection relationship is as follows:

[0037] The inverting output of ADN2841 adopts matching resistor 2, which is directly matched to VCC;

[0038] The positive phase output of ADN2841 is connected to the negative pole of DFB-1XXX-C5-2-2.5-LC-A-C-I-ZT2 through series resistor 5;

[0039] The non-inverting output of ADN2841 is connected to VCC through pull-up resistor 11, and connected to VCC through snubber network 3 and 4;

[0040] The...

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Abstract

The invention provides a coaxial aligning laser coupling drive circuit that comprises driver, series resistance and matching resistance R2, the drive circuit also includes pull up resistance and circumfluence capacitance, thereinto positive output end of said driver is connected with the negative pole of the coaxial aligning laser which is needed to drive, and connected with the power source end via the pull up resistance, the inverting output end of said driver is connected with the power source via the matching resistance R2, the working ground of said driver is connected with the positive pole of the coaxial aligning laser which is needed to drive via said circumfluence capacitance, the positive pole of the coaxial aligning laser which is needed to drive is connected with the power source end. Adopting the drive circuit, without adjustment, the parameters can be fit for the coaxial aligning laser with different plants and different batch; the producibility can be improved greatly.

Description

technical field [0001] The invention relates to a coaxial direct modulation laser coupling driving circuit, in particular to a coaxial direct modulation laser coupling driving circuit suitable for digital optical fiber transmission technology and electrical signal conversion to optical signal field. Background technique [0002] At present, coaxial direct modulation lasers are used in many optical communication products, such as TOSA, coaxial direct modulation lasers with pigtails, etc., which have laser core LD and detection PIN tube PD inside, and coaxial packaging on the outside. Such characteristics determine that when the coaxial direct modulation laser is working, the resistance value is only a few ohms, and the input impedance is not the standard 25 ohm impedance. The driving output impedance of the laser driver is a standard 25 ohm impedance, for example, the output impedance of ADN2841, MAX3735, GD16573, etc. is 25 ohm. In this way, there is a problem of impedance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/042H03K17/00
Inventor 许昌武华锋张赟
Owner ZTE CORP
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