CN201830261U

CN201830261U - Arrayed waveguide grating (AWG) with multichannel monitoring function

Info

Publication number: CN201830261U
Application number: CN2010205564703U
Authority: CN
Inventors: 陈思乡; 潘旭
Original assignee: Shenzhen Neo Photonic Technology Co Ltd
Current assignee: Shenzhen Neo Photonic Technology Co Ltd
Priority date: 2010-10-09
Filing date: 2010-10-09
Publication date: 2011-05-11
Anticipated expiration: 2020-10-09

Abstract

The utility model discloses an arrayed waveguide grating (AWG) with a multichannel monitoring function, which comprises an AWG chip, a fiber array and a detection receiving system, wherein an optical waveguide channel array which is output by the output waveguide of the AWG chip is coupled with the fiber array, the coupling surface of the output waveguide end surface of the AWG chip and the fiber array further comprises an optical film and a one-dimensional optical probe array, the optical film reflects part of optical wave signals transferred in the optical waveguide channel to the upper surface of the AWG chip, and the one-dimensional optical probe array receives and sends the reflected optical wave signals to the detection receiving system. The AWG with the multichannel monitoring function disclosed by the utility model has the characteristics of simpleness in realization, no wave damage to the original waveguide structure, real-time probing and accuracy, and has a better application prospect in a wavelength division multiplexing network system.

Description

AWG with multichannel monitoring function

Technical field

The utility model relates to array waveguide grating, particularly has the array waveguide grating of monitoring function.

Background technology

Along with the development of optical transmission research, wavelength-division multiplex technique has become a kind of effective means that increases communication information capacity." wavelength division multiplexing " is meant the photosynthetic of a plurality of wavelength transmitted in same waveguide or optical fiber, " demultiplexing " is meant the technology that the light in a waveguide or the optical fiber is separated by wavelength, array waveguide grating (AWG, Arrayed Waveguide Grating) is an a kind of desirable device of realizing wavelength division multiplexing/demultiplexing.This device is based on the plane light wave waveguide technology, by a phase controller, and a diffraction grating, and the input and output waveguide is formed.Compare with other grating technologies, AWG has flexible design, the insertion loss is low, filtering characteristic is good, performance is steady in a long-term and advantages such as easy and the effective coupling of optical fiber.

In the optical WDM communication system of reality, need monitor in real time luminous power, Optical Signal To Noise Ratio and the wavelength of each channel usually, with guarantee light signal in wavelength-division multiplex system reliably, transmission stably.Prior art has had much patent and the document about the AWG technology that has the channel monitoring device, for example application number is 00100262.7 and 99124363.3 Chinese patent, that introduce is the AWG with single channel monitoring function, and its channel monitoring device comprises array waveguide grating, optical power detector and conversion of signals and processing unit usually.The weak point of this system is that two required AWG performances have difference usually, thereby causes measurement accuracy and reliability lower.Other has application number is the Chinese patent of 03118765.X and 02216935.0, though realized the multichannel monitoring of waveguide array, but its method that obtains the pilot signal employing is the top covering attenuate with the wedge shape transition waceguide, the refractive index match sheet is set in the thinning area, makes the subwave leaded light match.This method is comparatively complicated to the processing of waveguide, needs to destroy waveguiding structure, so that influences the useful life of product.

The utility model content

Device processed complex at multichannel monitoring in the prior art, destroy the shortcoming of waveguiding structure, the utility model has disclosed a kind of based on technology such as array waveguide grating, surface optical plated film and optical power detector arrays, realized in wave division multiplex optical network system, to easy, the in real time and exactly monitoring of each communication channel luminous power.

The utility model has disclosed a kind of AWG of multichannel monitoring function, comprise the AWG chip, fiber array and detection receiving system, the fiber waveguide channel array and the fiber array of the output waveguide output of AWG chip are coupled, the output waveguide end face of AWG chip and the coupling surface of fiber array also comprise optical thin film and one dimension light probe array, to the AWG chip upper surface, the lightwave signal of one dimension light probe array received reflection also is sent to the detection receiving system to optical thin film with the lightwave signal partial reflection transmitted in the fiber waveguide passage.

It is easy, calm bad to original waveguiding structure that the AWG of the multichannel monitoring function that the utility model discloses has realization, surveys real-time, characteristic of accurate, has bigger application prospect in wave division multiplex optical network system.

Description of drawings

Fig. 1 is the disclosed front schematic view with AWG of multichannel monitoring function of the utility model;

Fig. 2 is the disclosed vertical view with AWG of multichannel monitoring function of the utility model.

Embodiment

In actual applications, fiber array is coupled to by the glass connector on the output waveguide of AWG, and the lightwave signal of exporting from AWG transmits by optical fiber.In order to realize the monitoring to transmission signals, realizing beam split from the lightwave signal of optical fiber output by a light-dividing device, a part of lightwave signal is used for monitoring usually, and another part lightwave signal continues to be transferred to next optical device.For the AWG of output multipath light signal, such monitor mode and supervising device complex structure, production cost height.

The utility model has disclosed monitor mode a kind of simple in structure, with low cost, as shown in Figure 1, is the disclosed front schematic view with AWG of multichannel monitoring function of the utility model.Shown in have a multichannel monitoring function AWG comprise AWG 110, fiber array 120 and survey receiving system 130.Expression for simplicity, 110 output waveguides of having drawn of AWG.As can be seen, AWG comprises monocrystalline substrate 111, fiber waveguide channel array 112 and the cover glass sheet 113 of chip from the front elevation.Fiber array 120 is connected with the output waveguide of AWG 110 by glass connector 121, usually in order to reduce the reflection of light wave at the coupling end face, reduce the device return loss, so on the coupling end face of the glass connector 121 of the output waveguide of AWG 110 and fiber array, grind out the have certain angle inclined plane of (30 °-60 °).In the disclosed practical application of the utility model, the inclination angle that end surface grinding goes out about 45 ° can make the monitoring effect of lightwave signal better.Plating one deck optical thin film 140 on the coupling surface of AWG 110 output waveguides, this film 140 has specific transmission/reflection ratio to lightwave signal in the operating wavelength range of AWG 110.In the present embodiment, supposing has 99% transmission by film 140 from the light wave of fiber waveguide channel array 112 output, have only 1% upwards reflection pass cover glass sheet 113.On the light wave pip position on the cover glass sheet 113, place one dimension light probe array 150, be used to obtain 1% the light wave that reflects from cover glass sheet 113.Because the angle of inclination shown in the figure is a signal angle, so the reflection direction of light wave also just illustrates direction, and in the practical application, one dimension light probe array 150 should be placed according to the actual pip of each road lightwave signal.Survey receiving system 130 and be connected on the one dimension light probe array 150, be used for the light signal that reflects from each road fiber waveguide is monitored in real time.

Fig. 2 is the disclosed vertical view with AWG of multichannel monitoring function of the utility model.As shown in the figure, fiber array 120 is connected to the output waveguide array of AWG by glass connector 121, can be 40 the tunnel or more multi-channel optical fibre output according to the model difference of AWG.Surveying receiving system 130 is provided with one dimension light probe array 150 according to the quantity of light path and is arranged on the upper surface of AWG 110.Among Fig. 2, the part probe of the part passage of the fiber waveguide channel array 112 of the part of only drawing and one dimension light probe array 150.One dimension light probe array 150 each probe all are connected to surveys receiving system 130.

In other embodiments, 140 pairs of different light waves of optical thin film can have different transmissions/reflection ratio, for example, refraction/reflection ratio to long wavelength light signal is 95%/5%, the refraction/reflection ratio of centering wave optical signal rate is 97%/3%, is 99%/1% to the refraction/reflection ratio of short wavelength light signaling rate.For different refraction/reflection ratios, as long as can obtain actual transmitting optical power divided by corresponding refraction/reflection proportionality coefficient at the reflected signal of surveying 130 pairs of acquisitions of receiving system.

Claims

1. the AWG of a multichannel monitoring function, comprise the AWG chip, fiber array and detection receiving system, the fiber waveguide channel array and the fiber array of the output waveguide output of AWG chip are coupled, it is characterized in that, the output waveguide end face of AWG chip and the coupling surface of fiber array also comprise optical thin film and one dimension light probe array, to the AWG chip upper surface, the lightwave signal of the described reflection of described one dimension light probe array received also is sent to the detection receiving system to described optical thin film with the lightwave signal partial reflection transmitted in the fiber waveguide passage.

2. the AWG of multichannel monitoring function as claimed in claim 1, it is characterized in that, the output waveguide end face of described AWG chip and the coupling surface of fiber array need be through grinding to form the inclined plane with angle, and described optical thin film is plated on the coupling surface through output waveguide end face that grinds and fiber array.

3. the AWG of multichannel monitoring function as claimed in claim 2 is characterized in that, when the lightwave signal that transmits in the described fiber waveguide passage passed through optical thin film, a part was transmitted in the described fiber array, and a part reflects by the AWG chip upper surface.

4. the AWG of multichannel monitoring function as claimed in claim 3, it is characterized in that, described optical thin film has identical transmission/reflection ratio to the lightwave signal of different wave length, and the lightwave signal of the described reflection of one dimension light probe array received also is sent to the detection receiving system.

5. the AWG of multichannel monitoring function as claimed in claim 4, it is characterized in that, described optical thin film has different transmissions/reflection ratio to the lightwave signal of different wave length, behind the lightwave signal of the described reflection of one dimension light probe array received divided by being sent to the detection receiving system behind corresponding transmission/reflection proportionality coefficient.

6. as the AWG of claim 2,3,4 or 5 described multichannel monitoring functions, it is characterized in that the range of tilt angles on described inclined-plane is 30 °-60 °.

7. the AWG of multichannel monitoring function as claimed in claim 6 is characterized in that, the range of tilt angles on described inclined-plane is 45 °.