CN201344841Y - Optical power, drive current and voltage graphic instrument for semiconductor laser - Google Patents

Abstract

The utility model discloses an optical power, drive current and voltage graphic instrument (for short P-I-V graphic instrument) for a semiconductor laser, and relates to a detection device for a semiconductor laser used in optical communication. The graphic instrument is connected between an oscillometer (1) and an LD coupling fixture (3), and the LD coupling fixture (3) is connected with a laser welding machine (4). The graphic instrument is characterized in that a P-I-V signal output module (21), a optical power meter module (22) and a current drive source module (23) are arranged; and the optical power meter module (22) and the current drive source module (23) are connected with the P-I-V signal output module (21). The graphic instrument can be cooperated with the oscillometer to display P-I-V curves of the semiconductor laser, and can be widely applied to production site of laser coupling.

Description

A kind of semiconductor laser luminous power, drive current, voltage graphic instrument

Technical field

The utility model relates to a kind of optical communication with semiconductor laser (being called for short LD) pick-up unit, relates in particular to a kind of semiconductor laser luminous power, drive current, voltage graphic instrument (being called for short the P-I-V graphic instrument).

Background technology

Optical communication is divided into coaxial packaging, the encapsulation of butterfly type and three kinds of forms of dip usually with semiconductor laser.Want to allow semiconductor laser go out luminous power and reach designing requirement, except in semiconductor laser tube core itself and device architecture design, improving, all be unable to do without this road critical process of coupling technique, its checkout equipment is absolutely necessary in the coupling production run, its requirement is to measure accurately, be quick on the draw, and adapts to the requirement of streamline speed of production.According to the specific (special) requirements of semiconductor laser, be badly in need of a kind of electrostatic prevention, the anti-P-I-V graphic instrument that powers up the surge phenomenon.

Summary of the invention

The purpose of this utility model just is to solve semiconductor laser and relates to this critical process of coupling in process of production, and a kind of P-I-V graphic instrument is provided.

The purpose of this utility model is achieved in that

Be connected between oscillograph and the LD coupling cramp, the LD coupling cramp is connected with laser-beam welding machine;

Be provided with P-I-V signal output module, light power meter module and current drives source module;

The light power meter module is connected with the P-I-V signal output module respectively with the current drives source module.

Principle of work of the present utility model is:

Semiconductor laser to be coupled is put into the LD coupling cramp, set the required driving current value of P-I-V graphic instrument, give LD loading current (direct current or interchange), utilize the LD coupling cramp to be coupled repeatedly again,, on the P-I-V graphic instrument, show to reach desired optical power value by means of the waveform that oscillograph shows, and the LD coupling cramp locked, again drive current is reduced to zero, sloughed connecting line, send with laser-beam welding machine and weld.

Its each module principle of work is as follows:

1, the LD electric current powers up

Realize by the current drives module.Regulate the signal of AC/DC signal generating circuit and give the LD driving circuit, load and set electric current, show the LD current value for simultaneously the drive current display circuit, give V-I signal processing circuit signal again to LD.

2, optical power value shows

Realize by the light power meter module.The LD that loads certain current value can send corresponding luminous power, receives by photoelectric switching circuit, converts electric signal to, through the AC/DC change-over circuit, gives luminous power display circuit display light performance number again, also gives P-I signal processing circuit signal simultaneously.

3, P-I-V signal output

Realize by the P-I-V signal output module.Signal by V-I signal processing circuit and P-I signal processing circuit obtain adds to simultaneously that " P-I, P-V signal output apparatus provide P-I-V signal to oscillograph.

Three, the utlity model has following advantage and good effect:

1, drive current: the 0-100mA direct current with exchange continuously adjustablely, accuracy is 0.5%.

2, luminous power: 0-2mW; Accuracy: 5%/DC, 10%/AC.

3, be applicable to 1310nm, 1550nm wavelength device is measured.

4, have laser instrument back facet current and curve monitoring function.

5, drive current has the slow function that powers up.

6, the utility model cooperates oscillograph can show the P-I-V curve of semiconductor laser, is widely used in laser instrument coupling production scene.

Description of drawings

Fig. 1 is the utility model block diagram;

Fig. 2 is a P-I-V signal output module block diagram;

Fig. 3 is a light power meter modular structure block scheme;

Fig. 4 is a driven with current sources modular structure block scheme.

Wherein:

The 1-oscillograph.

The 2-P-I-V graphic instrument;

The 21-P-I-V signal output module,

211-square-wave generator circuit,

212-P-I, V-I signal output apparatus,

The 213-P-I signal goes out to manage circuit,

The 214-V-I signal processing circuit;

22-light power meter module;

221-the one AC/DC change-over circuit,

The 222-photoelectric switching circuit,

223-luminous power display circuit,

The 224-wavelength is selected circuit,

225-is backlight/and preceding light selects circuit;

23-current drives source module;

The 231-LD driving circuit,

The slow treatment circuit that powers up of 232-,

233-the 2nd AC/DC change-over circuit,

The 234-AC/DC signal generating circuit,

235-drive current display circuit;

The 3-LD coupling cramp;

The 4-laser-beam welding machine.

English-Chinese:

The P-luminous power;

The I-drive current;

V-voltage;

LD-optical communication semiconductor laser;

The AC/DC-ac/dc.

Embodiment

Describe in detail below in conjunction with drawings and Examples:

One, general structure

As Fig. 1, P-I-V graphic instrument 2 is connected between oscillograph 1 and the LD coupling cramp 3, and LD coupling cramp 3 is connected with laser-beam welding machine 4;

P-I-V graphic instrument 2 comprises P-I-V signal output module 21, light power meter module 22 and current drives source module 23;

Light power meter module 22 is connected with P-I-V signal output module 2 respectively with current drives source module 23.

Two, functional block

1, the P-I-V signal output module 21

As Fig. 2, P-I-V signal output module 21 comprises square-wave generator circuit 211, P-I, V-I signal output apparatus 212, P-I signal processing circuit 213 and V-I signal processing circuit 214;

Square-wave generator circuit 211, P-I signal processing circuit 213 and V-I signal processing circuit 214 are connected with P-I, V-I signal output apparatus 212 respectively.

1. square-wave generator circuit 211 is a kind of common circuit, is made up of 555 integrated packages and electric capacity, resistance, and square-wave signal is provided; Main element can be selected for use as 555 integrated packages;

2. P-I, V-I signal output apparatus 212 are a kind of common circuit, are made of output P-I, V-I signal transistor amplifier, electronic analog swtich, electric capacity, resistance; Main element can be selected 8550,8050 triodes and CD4066 integrated package etc. for use;

3. P-I signal processing circuit 213 is a kind of common circuit, is made up of linear amplifier and electric capacity, resistance, potentiometer, and the signal of sampling on the photoelectric switching circuit 222 is handled, and exports to P-I, V-I signal output apparatus 212 again; Main element can be selected linear amplifier such as CA3140 integrated package, 3296 potentiometers etc. for use;

4. V-I signal processing circuit 214 is a kind of common circuit, is made up of linear amplifier and electric capacity, resistance, potentiometer, and the signal of sampling on the LD driving circuit 231 is handled, and exports to P-I, V-I signal output apparatus 212 again; Main element can be selected linear amplifier such as LM324,3296 potentiometers etc. for use.

2, the light power meter module 22

As Fig. 3, light power meter module 22 comprises an AC/DC change-over circuit 221, photoelectric switching circuit 222, luminous power display circuit 223, wavelength selection circuit 224 and backlight/preceding light selection circuit 225;

Wavelength selects circuit 224 to select circuit 225 to be connected with photoelectric switching circuit 222 respectively with backlight/preceding light; Photoelectric switching circuit 222, an AC/DC change-over circuit 221 are connected successively with luminous power display circuit 223.

1. an AC/DC change-over circuit 221 is a kind of ac-dc converter circuits, is made up of linear amplifier and electric capacity, resistance, diode, converts sampled signal to d. c. voltage signal; Main element can be selected for use as LM324, TL084 integrated package etc.;

2. photoelectric switching circuit 222 is a kind of common circuit, is made up of linear amplifier and photo-detector, resistance, converts light signal to voltage signal; Linear amplifier can be selected CA3140,741 integrated packages etc. for use;

3. luminous power display circuit 223 is standard components, can select 31/2 bit digital voltmeter head for use;

4. wavelength selection circuit 224 is a kind of common circuit, is made up of selector switch and resistance;

5. it is a kind of common circuit that backlight/preceding light is selected circuit 225, is made up of selector switch and resistance.

3, the current drives source module 23

As Fig. 4, current drives source module 23 comprises LD driving circuit 231, slow treatment circuit 232, AC/DC change-over circuit 233, the 2nd AC/DC signal generating circuit 234 and the drive current display circuit 235 of powering up;

The 2nd AC/DC signal generating circuit 234, slow power up treatment circuit 232, LD driving circuit 231, AC/DC change-over circuit 233 and drive current display circuit 235 and be connected successively.

1. LD driving circuit 231 is a kind of common circuit, is made up of linear amplifier and electric capacity, resistance, offers the stable friendship constant current of LD; Main element can be selected linear amplifier such as LM324 integrated package, triode such as TIP122 etc. for use;

2. the slow treatment circuit 232 that powers up is circuit that a kind of Single-chip Controlling is formed, and is made up of single-chip microcomputer, crystal oscillator, digital regulation resistance, electric capacity, resistance, provides for LD driving circuit 231 to delay to add electric signal; Main element can be selected single-chip microcomputer such as 89C2051 for use, digital regulation resistance such as X9C102P etc.;

3. the 2nd AC/DC signal generating circuit 234 is with an AC/DC change-over circuit 221.

4. AC/DC signal generating circuit 234 is a kind of common circuit, is made up of linear amplifier and electric capacity, resistance, produces direct current or interchange (sawtooth wave) signal, offers the slow treatment circuit 232 that powers up; Main element can be selected linear amplifier such as LM324, TL084 integrated package for use;

5. drive current display circuit 235 is standard components, selects 31/2 bit digital voltmeter head for use.

Claims (4)

1, a kind of semiconductor laser luminous power, drive current, voltage graphic instrument are connected between oscillograph (1) and the LD coupling cramp (3), and LD coupling cramp (3) is connected with laser-beam welding machine (4);

It is characterized in that:

Be provided with P-I-V signal output module (21), light power meter module (22) and current drives source module (23):

Light power meter module (22) is connected with P-I-V signal output module (21) respectively with current drives source module (23).

2, by the described graphic instrument of claim 1, it is characterized in that:

P-I-V signal output module (21) comprises square-wave generator circuit (211), P-I, V-I signal output apparatus (212), P-I signal processing circuit (213) and V-I signal processing circuit (214);

Square-wave generator circuit (211), P-I signal processing circuit (213) and V-I signal processing circuit (214) are connected with P-I, V-I signal output apparatus (212) respectively.

3, by the described graphic instrument of claim 1, it is characterized in that:

Light power meter module (22) comprises an AC/DC change-over circuit (221), photoelectric switching circuit (222), luminous power display circuit (223), wavelength selection circuit (224) and backlight/preceding light selection circuit (225);

Wavelength selects circuit (224) to select circuit (225) to be connected with photoelectric switching circuit (222) respectively with backlight/preceding light; Photoelectric switching circuit (222), an AC/DC change-over circuit (221) are connected successively with luminous power display circuit (223).

4, by the described graphic instrument of claim 1, it is characterized in that:

Current drives source module (23) comprises LD driving circuit (231), slow treatment circuit (232), AC/DC change-over circuit (233), the 2nd AC/DC signal generating circuit (234) and the drive current display circuit (235) of powering up;

The 2nd AC/DC signal generating circuit (234), slow power up treatment circuit (232), LD driving circuit (231), AC/DC change-over circuit (233) and drive current display circuit (235) and be connected successively.

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