CN217485740U - Bias voltage supply system of lithium niobate modulator - Google Patents

Abstract

The utility model discloses a lithium niobate modulator offset voltage supply system, include: the device comprises a lithium niobate modulator, a bias controller, a bias control clamp and a light source, wherein the light source is connected with the input end of the lithium niobate modulator, the output end of the lithium niobate modulator is connected with the input end of the bias controller, the output end of the bias controller is electrically connected with one end of the bias control clamp, and a lead pin at the bias end of the lithium niobate modulator is inserted into the other end of the bias control clamp and electrically contacted. The utility model discloses bias voltage controller applys bias voltage for the lithium niobate modulator through bias voltage control anchor clamps. The utility model discloses a bias voltage control anchor clamps easy to use easily operates, has improved efficiency, has increased area of contact, avoids the virtual short circuit that connects, guarantees the stability when bias voltage controller applys voltage for the lithium niobate modulator, can also change the size of circuit board according to the actual conditions of environment in addition, and is very convenient.

Description

Bias voltage supply system of lithium niobate modulator

Technical Field

The utility model relates to a communication correlation technique field, especially lithium niobate modulator bias voltage supply system.

Background

Optical fiber communication is developing towards high speed, long distance and large capacity, and the lithium niobate modulator has the advantages of high modulation rate, stable working performance, small chirp of modulation signal frequency, small optical loss and the like, and is widely applied to high-speed optical communication systems. However, the transfer function of the lithium niobate modulator is nonlinear, the bias operating point of the modulator can drift due to the changes of time, ambient temperature, external electric field, stress and other factors, and the drift of the operating point is restrained by the bias voltage applied by the bias controller, so that the performance stability of the modulator is ensured.

Fig. 1 is a block diagram of a conventional bias controller for applying a bias voltage to a lithium niobate modulator, where a light source 1 ' inputs a lithium niobate modulator 2 ', and the lithium niobate modulator 2 ' outputs to a bias controller 3 ', and then the bias controller 3 ' applies the bias voltage to a bias terminal 21 ' of the lithium niobate modulator 2 '. However, in the conventional method of applying a bias voltage to the lithium niobate modulator 2 'by the bias voltage controller 3', a BNC (bayonet Nut connector) rotor wire is used, one end of which is connected to the bias voltage controller 3 'through the BNC, and the other end of which is clamped on the lead pins of the lithium niobate modulator 2' through the clamp, so as to apply the voltage. The power-on mode is the most common mode at present, but the disadvantage of the mode is obvious, because the contact surface between the clamp and the guide pin is extremely small, under the influence of external factors, such as artificial mistaken collision, wind blowing and the like, the shaking of the clamp is caused, the virtual connection between the clamp and the guide pin is possibly caused, the bias voltage is unstable, and the working point is unstable. Meanwhile, four pins of the modulator have different functions, only two of the four pins are used when bias voltage is applied, wrong pins can be applied carelessly when the modulator is used, and the clamp is too small, so that the modulator is not convenient to use. In addition, when the insertion loss variation of the lithium niobate modulator is tested in a high-temperature and low-temperature environment, because the internal space of the temperature patrol box is limited, and a plurality of devices are tested at the same time, two clamps are required to be connected with each modulator when one modulator is powered on, and complicated wires can be wound by optical fibers to cause irreversible loss.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a bias voltage supply system for a lithium niobate modulator, which is directed to solve the technical problem that the bias voltage is likely to be unstable by pressurizing the lithium niobate modulator with a BNC rotor wire in the prior art.

The utility model provides a lithium niobate modulator offset voltage supply system, include: the device comprises a lithium niobate modulator, a bias controller, a bias control clamp and a light source, wherein the light source is connected with the input end of the lithium niobate modulator, the output end of the lithium niobate modulator is connected with the input end of the bias controller, the output end of the bias controller is electrically connected with one end of the bias control clamp, and a lead pin of the bias end of the lithium niobate modulator is inserted into the other end of the bias control clamp and electrically contacted with the other end of the bias control clamp.

Further, the bias control jig includes: the needle is arranged to anchor clamps, anchor clamps are arranged mother and circuit board, the needle is arranged to anchor clamps the welding of arranging mother is arranged on the circuit board, the needle is arranged including arranging the needle base and with arrange needle base fixed connection's stitch to anchor clamps, anchor clamps are arranged mother including arranging mother's base, arrange and seted up a plurality of electrical jack on the mother's base, the stitch of anchor clamps row needle with anchor clamps are arranged female electrical jack and are passed through the circuit board electricity and be connected, anchor clamps row needle with bias voltage controller's output electricity is connected, the leading needle of bias end inserts female electrical jack is arranged to anchor clamps and is electrically contacted with electrical jack.

Still further, the offset end includes a plurality of the pins, the fixture row bus includes a plurality of the electrical sockets, and the pitch of the electrical sockets of the fixture row bus is identical to the pitch of the pins of the offset end.

Further, the electrical jack height of the clamp row nut is consistent with the pin height of the offset end.

Further, the anchor clamps are arranged the needle and are included first stitch, second stitch, third stitch and fourth stitch, anchor clamps are arranged female including first electric jack, second electric jack, third electric jack, fourth electric jack, first stitch with first electric jack passes through the circuit board electricity and connects, the second stitch with second electric jack passes through the circuit board electricity and connects, the third stitch with third electric jack passes through the circuit board electricity and connects, the fourth stitch with fourth electric jack passes through the circuit board electricity and connects, first stitch the second stitch with the output electricity of bias voltage controller is connected, four leading needles of biasing end insert respectively first electric jack, second electric jack, third electric jack and fourth electric jack.

Still further, the pins of the modulator are a dc voltage negative input pin, a dc voltage positive input pin, a photoelectric conversion output negative pin, and a photoelectric conversion output positive pin, respectively, the dc voltage negative input pin is inserted into the first electrical jack, the dc voltage positive input pin is inserted into the second electrical jack, the photoelectric conversion output negative pin is inserted into the third electrical jack, the photoelectric conversion output positive pin is inserted into the fourth electrical jack, and the third pin is short-circuited with the fourth pin.

Still further, the bias control fixture further comprises a short circuit row bus, the third pin and the fourth pin are respectively inserted into the two electrical jacks of the short circuit row bus, and the two electrical jacks of the short circuit row bus are electrically connected.

Furthermore, a copper wire is arranged on the circuit board, and pins of the clamp pin header are electrically connected with the female electrical jacks of the clamp pin header through the copper wire.

Furthermore, the device comprises a plurality of lithium niobate modulators and a plurality of bias controllers, wherein the bias control fixture comprises a plurality of groups of pin row buses welded on the circuit board, each group of pin row buses comprises paired fixture row pins and fixture row buses, pins of the fixture row pins in the same group are electrically connected with electrical jacks of the fixture row buses in the same group through the circuit board, each fixture row pin is electrically connected with an output end of one bias controller, and a leading pin at the offset end of one lithium niobate modulator is inserted into an electrical jack of one fixture row bus and is electrically connected with the electrical jacks.

Furthermore, the clamp pin header further comprises a controller plug, the input end of the controller plug is electrically connected with the output end of the bias voltage controller, the output end of the controller plug is a female connector, and the clamp pin header is inserted into the output end of the controller plug.

The utility model discloses bias voltage controller applys bias voltage for the lithium niobate modulator through bias voltage control anchor clamps. The utility model discloses a bias voltage control anchor clamps easy to use easily operates, has improved efficiency, has increased area of contact, avoids the virtual short circuit that connects, guarantees the stability when bias voltage controller applys voltage for the lithium niobate modulator, can also change the size of circuit board according to the actual conditions of environment in addition, and is very convenient.

Drawings

FIG. 1 is a system schematic of a prior art lithium niobate modulator bias voltage supply system;

fig. 2 is a schematic diagram of the system for supplying bias voltage to the lithium niobate modulator of the present invention;

fig. 3 is a schematic diagram of a bias control fixture according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a clamp nut row according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a pin header of an embodiment of the present invention;

fig. 6 is a schematic diagram of a circuit connection between the fixture bus bar and the fixture pin header according to an embodiment of the present invention;

fig. 7 is a schematic view of an embodiment of the present invention, wherein the fixture pin header is additionally provided with a short-circuit pin header.

Description of the mark

1' -a light source; 2' -lithium niobate modulator; 21' -offset end; 3' -a bias controller; 1-a lithium niobate modulator; 11-bias terminal; 2-a bias controller; 3-bias control fixture; 31-clamp pin header; 310-pin header base; 311-first stitch; 312 — a second stitch; 313-a third stitch; 314-fourth pin; 32-clamp nut arrangement; 320-row female bases; 321-a first electrical receptacle; 322-a second electrical jack; 323-a third electrical jack; 324-a fourth electrical jack; 33-a circuit board; 34-short circuit bus bar; 4-light source.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that as used in the following description, the terms "front," "back," "left," "right," "upper" and "lower" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Example one

Fig. 2 shows a schematic diagram of a system for supplying bias voltage to a lithium niobate modulator according to the present invention, which includes: the device comprises a lithium niobate modulator 1, a bias controller 2, a bias control clamp 3 and a light source 4, wherein the light source 4 is connected with the input end of the lithium niobate modulator 1, the output end of the lithium niobate modulator 1 is connected with the input end of the bias controller 2, the output end of the bias controller 2 is electrically connected with one end of the bias control clamp 3, and a guide pin of a bias end 11 of the lithium niobate modulator 1 is inserted into the other end of the bias control clamp 3 and electrically contacted with the other end.

Specifically, the lithium niobate modulator 1 is connected to the light source 4, receives an input of the light source 4, and outputs a corresponding signal to the bias controller 2. The bias controller 2 outputs a bias voltage to the bias terminal 11 of the lithium niobate modulator 1 through the bias control jig 3 based on the received signal. The output end of the bias controller 2 is electrically connected with one end of the bias control clamp 3, and the pin of the bias end 11 of the lithium niobate modulator 1 is inserted into the other end of the bias control clamp 3 and electrically contacted. By inserting the lead pins of the offset end 11 into the bias control jig 3, the lead pins can be reliably fixed by the bias control jig 3, avoiding a virtual joint.

The utility model discloses bias voltage controller applys bias voltage for the lithium niobate modulator through bias voltage control anchor clamps. The utility model discloses a bias voltage control anchor clamps easy to use easily operates, has improved efficiency, has increased area of contact, avoids the virtual short circuit that connects, guarantees the stability when bias voltage controller applys voltage for the lithium niobate modulator, can also change the size of circuit board according to the actual conditions of environment in addition, and is very convenient.

Example two

Fig. 2 to 7 show an embodiment of the present invention of a bias voltage supply system for a lithium niobate modulator, including: the device comprises a lithium niobate modulator 1, a bias controller 2, a bias control clamp 3, a light source 4 and a controller plug (not shown in the figure), wherein the light source 4 is connected with the input end of the lithium niobate modulator 1, the output end of the lithium niobate modulator 1 is connected with the input end of the bias controller 2, the output end of the bias controller 2 is electrically connected with one end of the bias control clamp 3, a pin of a bias end 11 of the lithium niobate modulator 1 is inserted into the other end of the bias control clamp 3 and electrically contacted with the other end of the bias control clamp 3, the input end of the controller plug is electrically connected with the output end of the bias controller 2, the output end of the controller plug is a female connector, and a clamp pin 31 is inserted into the output end of the controller plug;

the bias control jig 3 includes: the clamp is arranged needle 31, the clamp is arranged mother 32 and circuit board 33, the clamp is arranged needle 31, the clamp is arranged mother 32 and welded on the circuit board 33, the clamp is arranged needle 31 comprises a needle base 310 and a stitch fixedly connected with the needle base 310, the clamp is arranged mother 32 comprises a mother base 320, a plurality of electrical jacks are arranged on the mother base 320, the stitch of the clamp is arranged needle 31 is electrically connected with the electrical jack of the clamp arranged mother 32 through the circuit board 33, the clamp is arranged needle 31 is electrically connected with the output end of the bias voltage controller 2, the leading needle of the bias end 11 is inserted into the electrical jack of the clamp arranged mother 32 and electrically contacted with the electrical jack, the bias end 11 comprises a plurality of leading needles, the clamp is arranged mother 32 comprises a plurality of electrical jacks, the distance between the electrical jacks of the clamp arranged mother 32 is consistent with the distance between the leading needles of the bias end 11, the height of the electrical jacks of the clamp row nut 32 is consistent with the height of the guide pins of the offset end 11;

the clamp pin header 31 includes a first pin 311, a second pin 312, a third pin 313 and a fourth pin 314, the clamp pin header 32 includes a first electrical jack 321, a second electrical jack 322, a third electrical jack 323 and a fourth electrical jack 324, the first pin 311 is electrically connected to the first electrical jack 321 through a circuit board 33, the second pin 312 is electrically connected to the second electrical jack 322 through the circuit board 33, the third pin 313 is electrically connected to the third electrical jack 323 through the circuit board 33, the fourth pin 314 is electrically connected to the fourth electrical jack 324 through the circuit board 33, the first pin 311, the second pin 312 are electrically connected to the output end of the bias controller 2, four pins of the bias terminal 11 are respectively inserted into the first electrical jack 321, the second electrical jack 322 and the third electrical jack 323, And the fourth electrical jack 324, the pins of the modulator are respectively a direct-current voltage negative input pin, a direct-current voltage positive input pin, a photoelectric conversion output negative pin and a photoelectric conversion output positive pin, the direct-current voltage negative input pin is inserted into the first electrical jack 321, the direct-current voltage positive input pin is inserted into the second electrical jack 322, the photoelectric conversion output negative pin is inserted into the third electrical jack 323, the photoelectric conversion output positive pin is inserted into the fourth electrical jack 324, the third pin 313 is in short circuit connection with the fourth pin 314, a copper wire is arranged on the circuit board 33, and the pin of the clamp pin header 31 is electrically connected with the electrical jack of the clamp header 32 through the copper wire.

Specifically, as shown in fig. 3, the bias control jig 3, which is specifically used for applying a bias voltage to the lithium niobate modulator, is mainly composed of a jig pin header 31, a jig pin header 32, and a circuit board 33, the jig pin header 32 is used for connecting with the pins of the lithium niobate modulator 1, the jig pin header 31 is used for connecting with the bias controller 2, the jig pin header 31 and the jig pin header 32 are soldered on the circuit board 33 through via holes and connected with each other by copper wires in the circuit board 33, and the jig pin header 31, the jig pin header 32, and the electrical connection principle between the two are shown in fig. 4 to 6. The modulator comprises 4 pins, namely a direct-current voltage negative electrode input pin DC +, a direct-current voltage positive electrode input pin DC +, a photoelectric conversion output negative electrode pin PD + and a photoelectric conversion output positive electrode pin PD +. Clamp pin bank 31 includes first pin 311, second pin 312, third pin 313, and fourth pin 314, and clamp bar 32 includes first electrical receptacle 321, second electrical receptacle 322, third electrical receptacle 323, and fourth electrical receptacle 324. The first pins 311 are electrically connected to the first electrical jack 321 through the circuit board 33, the second pins 312 are electrically connected to the second electrical jack 322 through the circuit board 33, the third pins 313 are electrically connected to the third electrical jack 323 through the circuit board 33, and the fourth pins 314 are electrically connected to the fourth electrical jack 324 through the circuit board 33. The first pin 311 and the second pin 312 are inserted into a controller plug electrically connected to an output terminal of the bias controller 2. The first pin 311 and the first electrical jack 321 are DC-terminals, the DC voltage negative input pin of the modulator 4 is inserted into the first electrical jack 321, the second pin 312 and the second electrical jack 322 are DC + terminals, the DC voltage positive input pin of the modulator 4 is DC + inserted into the second electrical jack 322, the third pin 313 and the third electrical jack 323 are PD-terminals, the photoelectric conversion output negative pin PD-of the modulator 4 is inserted into the third electrical jack 323, the fourth pin 314 and the fourth electrical jack 324 are PD + terminals, and the photoelectric conversion output positive pin PD + of the modulator 4 is inserted into the fourth electrical jack 324.

The controller plug is preferably a BNC rotor wire. The input end is a BNC plug, and the output end is a female head adopting a DuPont wire. The first pin 311 and the second pin 312 are inserted into the dupont line female of the controller plug as the output terminal, and the BNC plug is inserted into the output terminal of the bias controller 2.

The distance between the electrical jacks of the fixture row nut 32 is designed in advance, and is equal to the distance between the four pins of the lithium niobate modulator 1, and the height of the electrical jacks in the fixture row nut 32 is consistent with the height of the pins. During the use, at first link to each other bias voltage controller 2 and anchor clamps row needle 31, because the utility model discloses a bias voltage control anchor clamps 3 is a mounting fixture, after this part is connected for the first time, need not dismantling, then insert the four leading pins of lithium niobate modulator 1 in the female 32 of anchor clamps row. Because the clamp row mother 32 is fixed, the guide pin and the clamp row mother 32 only have one connection mode, and the condition that the guide pin is mistakenly clamped by a clamp cannot occur. In addition, the overlapped part of the guide pin and the clamp row nut 32 is long, so that the contact area is large, and the stability when voltage is applied is ensured. By pulling out and inserting the pins, different modulators can be replaced, so that the operation of applying a bias voltage to the lithium niobate modulator is extremely simple. The size of the circuit board 33 may vary depending on the particular test environment.

The bias control clamp of this embodiment, it is easy to use easily to operate, has improved efficiency, has increased area of contact, avoids the virtual short circuit that connects, guarantees the bias controller stability when applying voltage for the lithium niobate modulator, can also change the size of circuit board according to the actual conditions of environment in addition, and is very convenient.

In one embodiment, the bias control clamp 3 further includes a short-circuit bar 34, the third pin 313 and the fourth pin 314 are respectively inserted into two electrical sockets of the short-circuit bar 34, and the two electrical sockets of the short-circuit bar 34 are electrically connected.

This embodiment is female through the short circuit row, with third stitch and fourth stitch short circuit, avoids the wrong connection.

In one embodiment, the device comprises a plurality of lithium niobate modulators 1 and a plurality of bias controllers 2, the bias control clamp 3 comprises a plurality of pin headers welded on the circuit board 33, each pin header comprises a clamp header 31 and a clamp header 32, pins of the clamp header 31 in the same group are electrically connected with electrical jacks of the clamp header 32 in the same group through the circuit board 33, each clamp header 31 is electrically connected with an output end of one of the bias controllers 2, and a pin of the offset end 11 of one of the lithium niobate modulators 1 is inserted into an electrical jack of one of the clamp headers 32 and electrically connected with the electrical jack.

Specifically, the number of the fixture pins 31 and the fixture nuts 32 arranged on the circuit board 33 may be determined according to the need to measure several lithium niobate modulators simultaneously. Therefore, even if the insertion loss variation of a plurality of lithium niobate modulators is measured in a temperature patrol box with narrow space, the spatial hierarchy can be ensured to be clear, and the optical fiber is protected without redundant wires except the input and output optical fibers of the modulators.

The above-mentioned embodiments only represent several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A lithium niobate modulator bias voltage supply system, comprising: the device comprises a lithium niobate modulator (1), a bias controller (2), a bias control clamp (3) and a light source (4), wherein the light source (4) is connected with the input end of the lithium niobate modulator (1), the output end of the lithium niobate modulator (1) is connected with the input end of the bias controller (2), the output end of the bias controller (2) is electrically connected with one end of the bias control clamp (3), and a lead pin of a bias end (11) of the lithium niobate modulator (1) is inserted into the other end of the bias control clamp (3) and electrically contacted with the other end.

2. The lithium niobate modulator bias voltage supply system according to claim 1, characterized in that the bias control jig (3) comprises: needle (31), anchor clamps are arranged mother (32) and circuit board (33) to anchor clamps, anchor clamps arrange needle (31) anchor clamps are arranged mother (32) welding on circuit board (33), anchor clamps arrange needle (31) including arrange needle base (310) and with arrange needle base (310) fixed connection's stitch, anchor clamps are arranged mother (32) including arranging mother base (320), arrange and seted up a plurality of electric jacks on mother base (320), the stitch of anchor clamps are arranged needle (31) with the electric jack that anchor clamps were arranged mother (32) passes through circuit board (33) electricity and is connected, anchor clamps are arranged needle (31) with the output electricity of bias voltage controller (2) is connected, the needle that draws of bias end (11) inserts the electric jack that anchor clamps were arranged mother (32) and with electric jack electrical contact.

3. The lithium niobate modulator bias voltage supply system according to claim 2, wherein the bias terminal (11) includes a plurality of the pins, the jig row bus (32) includes a plurality of the electrical jacks, and a pitch of the electrical jacks of the jig row bus (32) coincides with a pitch of the pins of the bias terminal (11).

4. The lithium niobate modulator bias voltage supply system according to claim 2, wherein the electrical receptacle height of the clamp array female (32) coincides with the pin height of the bias terminal (11).

5. The lithium niobate modulator bias voltage supply system according to claim 2, characterized in that the clamp pin array (31) comprises a first pin (311), a second pin (312), a third pin (313), and a fourth pin (314), the clamp pin array (32) comprises a first electrical jack (321), a second electrical jack (322), a third electrical jack (323), and a fourth electrical jack (324), the first pin (311) is electrically connected with the first electrical jack (321) through a circuit board (33), the second pin (312) is electrically connected with the second electrical jack (322) through a circuit board (33), the third pin (313) is electrically connected with the third electrical jack (323) through a circuit board (33), and the fourth pin (314) is electrically connected with the fourth electrical jack (324) through a circuit board (33), the first pin (311) and the second pin (312) are electrically connected with the output end of the bias controller (2), and four pins of the bias end (11) are respectively inserted into the first electrical jack (321), the second electrical jack (322), the third electrical jack (323) and the fourth electrical jack (324).

6. The lithium niobate modulator bias voltage supply system according to claim 5, wherein the pins of the modulator are a dc voltage negative input pin, a dc voltage positive input pin, a photoelectric conversion output negative pin, and a photoelectric conversion output positive pin, respectively, the dc voltage negative input pin is inserted into the first electrical jack (321), the dc voltage positive input pin is inserted into the second electrical jack (322), the photoelectric conversion output negative pin is inserted into the third electrical jack (323), the photoelectric conversion output positive pin is inserted into the fourth electrical jack (324), and the third pin (313) is short-circuited to the fourth pin (314).

7. The lithium niobate modulator bias voltage supply system according to claim 6, wherein the bias control jig (3) further comprises a short-circuit bar female (34), the third pin (313) and the fourth pin (314) are respectively inserted into two electrical insertion holes of the short-circuit bar female (34), and the two electrical insertion holes of the short-circuit bar female (34) are electrically connected.

8. The lithium niobate modulator bias voltage supply system according to claim 2, characterized in that the circuit board (33) is provided with a copper wire, and the pins of the clamp pin header (31) and the electrical sockets of the clamp pin header (32) are electrically connected through the copper wire.

9. The lithium niobate modulator bias voltage supply system according to claim 2, comprising a plurality of lithium niobate modulators (1) and a plurality of bias controllers (2), wherein the bias control jig (3) comprises a plurality of sets of pin headers welded to the circuit board (33), each set of pin headers comprises a jig header (31) and a jig header (32) which are paired, pins of the jig header (31) of the same set are electrically connected to electrical sockets of the jig header (32) of the same set through the circuit board (33), each jig header (31) is electrically connected to an output terminal of one of the bias controllers (2), and pins of the offset terminal (11) of one of the lithium niobate modulators (1) are inserted into and electrically connected to electrical sockets of one of the jig headers (32).

10. The lithium niobate modulator bias voltage supply system according to claim 2, further comprising a controller plug, an input terminal of the controller plug being electrically connected to an output terminal of the bias controller (2), an output terminal of the controller plug being a female terminal, the clamp pin header (31) being inserted into the output terminal of the controller plug.

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