CN208284780U

CN208284780U - Microminiature fiber amplifier

Info

Publication number: CN208284780U
Application number: CN201820632800.9U
Authority: CN
Inventors: 陈金龙
Original assignee: Wuxi Taclink Optoelectronics Technology Co Ltd
Current assignee: Wuxi dekeli Optoelectronic Technology Co.,Ltd.
Priority date: 2018-04-28
Filing date: 2018-04-28
Publication date: 2018-12-25
Anticipated expiration: 2028-04-28

Abstract

The utility model belongs to fiber optical amplifier technology field, it is related to microminiature fiber amplifier, the input terminal that amplifier input optical signal passes through about 250 μm of the two-in-one device of intelligent acess, optical signal successively passes through the lens focus of two-in-one device inside, and the output end of the two-in-one device of intelligent acess by about 165 μm, it is connected again by about 165 μm of Er-doped fiber and the input terminal of isolator, optical signal successively passes through the lens focus inside isolator, and the output end of the intelligent acess isolator by about 250 μm, pass through the input terminal of about 250 μm of intelligent acess photodetector again, the output of photodetector terminates amplifier output optical signal；Pump laser is connect by about 165 μm of optical fiber with two-in-one device；Connection is all made of about 165 μm of optical fiber between two-in-one device, isolator and pump laser inside the fiber amplifier, saves space in this way, the outer dimension of fiber amplifier is made to become smaller.

Description

Microminiature fiber amplifier

Technical field

The utility model relates to a kind of fiber amplifier, especially a kind of microminiature fiber amplifier belongs to fiber amplifier Device technical field.

Background technique

The fast-developing requirement to Transmission system integrated level of modern communication is higher and higher, this is just to fiber amplifier shape The requirement of volume is also just higher and higher, but the volume of fiber amplifier in the prior art is not able to satisfy still in industry to transmission The requirement of system high integration.

Summary of the invention

The purpose of this utility model is to provide a kind of microminiature fiber amplifier, the optical fiber for problem of the prior art The connection between synthesizer (i.e. two-in-one device), isolator and pump laser inside amplifier be all made of optical fiber be compared with The optical fiber that thin diameter is about 165 μm, which offers a saving spaces, so that the outer dimension of fiber amplifier becomes smaller.

To realize the above technical purpose, the technical solution of the utility model is: microminiature fiber amplifier, including optical path device Part and circuit devcie, the light path devices include two-in-one device, isolator and photodetector, and the circuit devcie includes print Printed circuit board and the pump laser above the printed circuit board, and light path devices are located at the top of printed circuit board, It is characterized in that, amplifier input optical signal passes through the input terminal of 245 μm ~ 255 μm of diameter of the two-in-one device of intelligent acess, described It is anti-that optical signal successively passes through the two-in-one device input lens focus of two-in-one device inside, two-in-one device output end lens It focuses, and by the output end of the two-in-one device of intelligent acess of the diameter less than 245 μm, the output end of the two-in-one device is logical The input terminal for crossing Er-doped fiber of the diameter less than 245 μm and isolator connects, and the optical signal successively passes through inside isolator Isolator input terminal lens focus, isolator output end lens are counter focuses, and by 245 μm ~ 255 μm of diameter of intelligent acess every Output end from device, the output end of the isolator pass through the input of 245 μm ~ 255 μm of diameter of intelligent acess photodetector The output at end, the photodetector terminates amplifier output optical signal；The pump laser is by diameter less than 245 μm Optical fiber is connect with two-in-one device.

Further, pass through the junction of the sequentially connected two-in-one device of optical fiber, isolator and photodetector It is light pricker fusion point, two optical fiber fusion welding points are placed in a twin-core heat-shrinkable T bush.

Further, extra small pumping of the pump laser using 3 needles without refrigeration series, and given by two-in-one device Optical fiber provides light stimulus.

Further, the photodetector be band light splitting export photodetector, and diameter only have 1.75mm ~ 1.85mm。

Further, the diameter of the two-in-one device and isolator is 2.1mm ~ 2.3mm.

Further, the outer dimension of the fiber amplifier is 45 mm × 15.5 mm × 7.5mm.

Further, isolator and WDM device are integrated in the two-in-one device.

Compared with prior art, the utility model has the advantage that

1) synthesizer inside the fiber amplifier of the utility model (i.e. two-in-one device), isolator and pumping laser It is the optical fiber that thinner diameter is about 165 μm that connection between device, which is all made of optical fiber, and which offers a saving spaces, so that fiber amplifier The outer dimension of device becomes smaller；

2) extra small pumping of the pump laser of the utility model using 3 needles without refrigeration series, further saves space, Keep the outer dimension of fiber amplifier smaller；

3) the two-in-one device of the photoelectric device of the utility model and the diameter of isolator are each about 2.2mm, and band is divided defeated Only there are about 1.8mm for photodetector diameter out, and compared with existing amplifier, size is very small, makes the shape of fiber amplifier It is smaller；

4) the utility model module interior space is very compact, and the outer dimension of fiber amplifier is only 45 mm × 15.5 mm×7.5mm。

Detailed description of the invention

Fig. 1 is the utility model fiber amplifier structural schematic diagram.

Fig. 2 is the structural schematic diagram of the two-in-one device of the utility model or isolator interior len.

Description of symbols: 1-two-in-one device；11-two-in-one device input lens；12-two-in-one devices are defeated Outlet lens；2-isolators；21-isolator input terminal lens；22-isolator output end lens；3-photodetectors； 4-pump lasers.

Specific embodiment

Below with reference to specific drawings and examples, the utility model is described in further detail.

Microminiature fiber amplifier, including light path devices and circuit devcie, the light path devices include two-in-one device 1, Isolator 2 and photodetector 3, the circuit devcie include printed circuit board and pump above the printed circuit board sharp Light device 4, and light path devices are located at the top of printed circuit board；

As depicted in figs. 1 and 2, amplifier input optical signal passes through about 250 μm of diameter of the two-in-one device 1 of intelligent acess Input terminal, the optical signal is successively by two-in-one device input lens 11 focusing inside two-in-one device 1, two-in-one device Part output end lens 12 instead focus, and the output end of the two-in-one device 1 of intelligent acess by about 165 μm of diameter, and described two close The output end of one device 1 is connect by about 165 μm of diameter of Er-doped fiber with the input terminal of isolator 2, and the optical signal is successively It is focused by the isolator input terminal lens 21 inside isolator 2, the anti-focusing of isolator output end lens 22, and about by diameter The output end of 250 μm of intelligent acess isolator 2, the output end of the isolator 2 pass through about 250 μm of diameter of intelligent acess light The output of the input terminal of electric explorer 3, the photodetector 3 terminates amplifier output optical signal；The pump laser 4 is logical It crosses about 165 μm of diameter of optical fiber to connect with two-in-one device 1, extra small pump of the pump laser 4 using 3 needles without refrigeration series Pu, and light stimulus is provided to optical fiber by two-in-one device 1.

Isolator and WDM device are integrated in two-in-one device 1 described in the utility model.

The outer dimension of the utility model fiber amplifier is 45mm × 15.5 mm × 7.5mm, wherein two-in-one device 1 It is each about 2.2mm with the diameter of isolator 2, photodetector 3 is the photodetector with light splitting output, and diameter is only about 1.8mm, the connection between internal synthesizer (i.e. two-in-one device 1), isolator 2 and pump laser 4 are all made of optical fiber The optical fiber for being about 165 μm for thinner diameter, which offers a saving space, so that become can for the pure smooth fiber amplifier of small size Energy；Due to about 250 μm of optical fiber that the communication network outside fiber amplifier still uses mostly, if the input and output of fiber amplifier End directly uses about 165 μm of optical fiber, then can cause excess loss because of mode field diameter difference, the utility model passes through tune Input terminal lens and output end lens focus length in whole two-in-one device 1, making the input of two-in-one device 1 is about 250 μm of light Fibre, output are about that 165 μm of optical fiber equally by adjusting input terminal lens in isolator 2 and output end lens focus length, make The input of isolator 2 is about 165 μm of optical fiber, and output is about 250 μm of optical fiber, and such fusion point is without 250 μm of optical fiber to 165 μm of light Fibre, avoiding fibre-optic mode field diameter difference leads to excess loss, and how lens focus length is adjusted to those skilled in the art institute Well known, details are not described herein again；

In order to further realize the miniaturization of amplifier, the utility model also uses twin-core heat-shrinkable T bush, passes through optical fiber The junction of the sequentially connected two-in-one device 1, isolator 2 and photodetector 3 is light pricker fusion point, two optical fiber Fusion point is placed in a twin-core heat-shrinkable T bush, can save space to the greatest extent in this way.

Since the output power of amplifier described in the utility model is not very big (maximum supports 16dBm output), and by There was only 45 mm × 15.5 mm × 7.5mm in the outer dimension of module, 3 needles can only be selected subminiature and pumped without refrigeration series, Since fiber amplifier heats smaller in normal work, heat dissipation is convenient will not be problematic, and it is reliable to can satisfy fiber amplifier Property require.

In the design aspect of printed circuit board (pcb board), is placed using the positive negative side's patch of device, as much as possible reduced Pcb board size；Analog circuit, digital circuit are placed according to function Relatively centralized respectively in layout, avoid numerical portion to simulation The interference effect of circuit especially avoids the detection on output signal light from influencing.

The extra small fiber amplifier product internal structure of the utility model uses Multi-layer design, on a printed circuit indirectly It placed light path devices, light path devices are glass-encapsulateds, without the structure of metal sleeve encapsulation, are contacted in this way with pcb board, will not Cause the shorted devices on pcb board.

The utility model is compact-sized, and size is small, suitable for the transmitting board or reception board of High Density Integration, Neng Gouman Sufficient optical fiber telecommunications system backbone network, the demand for accessing net and cable television network.

The utility model and embodiments thereof are described above, description is not limiting, shown in the drawings It also is one of the embodiments of the present invention, practical structures are not limited thereto.All in all if this field it is common Technical staff is enlightened by it, without deviating from the purpose of the present invention, is not inventively designed and the skill The similar frame mode of art scheme and embodiment, all should belong to the protection range of the utility model.

Claims

1. microminiature fiber amplifier, including light path devices and circuit devcie, the light path devices include two-in-one device (1), Isolator (2) and photodetector (3), the circuit devcie include printed circuit board and the pump above the printed circuit board Pu laser (4), and light path devices are located at the top of printed circuit board, which is characterized in that amplifier input optical signal passes through straight The input terminal of 245 μm ~ 255 μm of diameter of the two-in-one device of intelligent acess (1), the optical signal successively pass through two-in-one device (1) Internal two-in-one device input lens (11) focus, two-in-one device output end lens (12) instead focus, and pass through diameter The output end of the output end of the two-in-one device of intelligent acess (1) less than 245 μm, the two-in-one device (1) is small by diameter Connect in 245 μm of Er-doped fibers with the input terminal of isolator (2), the optical signal successively pass through isolator (2) it is internal every It is focused from device input terminal lens (21), isolator output end lens (22) anti-focusing, and by 245 μm ~ 255 μm of diameter of optical fiber The output end of isolator (2) is accessed, the output end of the isolator (2) passes through 245 μm ~ 255 μm of diameter of intelligent acess photoelectricity The output of the input terminal of detector (3), the photodetector (3) terminates amplifier output optical signal；The pump laser (4) it is connect by Er-doped fiber of the diameter less than 245 μm with two-in-one device (1).

2. microminiature fiber amplifier according to claim 1, it is characterised in that: pass through optical fiber sequentially connected described two The junction for unifying device (1), isolator (2) and photodetector (3) is light pricker fusion point, and two optical fiber fusion welding points are placed in In one twin-core heat-shrinkable T bush.

3. microminiature fiber amplifier according to claim 1, it is characterised in that: the pump laser (4) uses 3 needles Extra small pumping without refrigeration series, and light stimulus is provided to optical fiber by two-in-one device (1).

4. microminiature fiber amplifier according to claim 1, it is characterised in that: the photodetector (3) is band point The photodetector of light output, and diameter only has 1.75mm ~ 1.85mm.

5. microminiature fiber amplifier according to claim 1, it is characterised in that: the two-in-one device (1) and isolation The diameter of device (2) is 2.1mm ~ 2.3mm.

6. microminiature fiber amplifier according to claim 1, it is characterised in that: the outer dimension of the fiber amplifier For 45 mm × 15.5 mm × 7.5mm.

7. microminiature fiber amplifier according to claim 1, it is characterised in that: integrated in the two-in-one device (1) There are isolator and WDM device.