CN2583887Y - Device for multipath wave length light-power and light frequency monitoring based on waveguide array grating - Google Patents

Abstract

The utility model discloses a device for monitoring the light power and the light frequency of multiway wave length based on a waveguide array grating, which relates to a waveguide array grating type wavelength division multiplexer / demultiplexer. The utility model monitors the light intensity of the main diffraction grade (m grade) of an AWG type wave division multiplex device and simultaneously monitors the size of the light power of multiway wave length. Meanwhile, the utility model monitors the light intensity of two secondary diffraction grades (m-1 grade and m+1 grade) of the AWG type wave division multiplex device and simultaneously monitors the size of the light frequency of the multiway wave length, and thus the aims of simultaneously monitoring the light power and the light frequency are obtained. The utility model is composed of the AWG type wave division multiplex device, a trapezoidal coupler, a light intensity detector, an amplifier, a divider, a logometer and a computer. The utility model can simultaneously monitor the light power and the light frequency of the multiway wave length, and the utility model having the advantages of simple structure, small size and reliable performance is suitable for integration.

Description

A kind of multichannel wavelength light power and light frequency device for monitoring based on waveguide array grating

Technical field

The utility model relates to waveguide array grating type Wavelength division multiplexer/demultiplexer spare, relates in particular to its multichannel wavelength light power and light frequency device for monitoring.

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.So-called " wavelength division multiplexing " is meant the photosynthetic of a plurality of different wave lengths transmitted in same waveguide or optical fiber, and " demultiplexing " is the technology that the light with the different wave length in same waveguide or the optical fiber separates according to wavelength.Usually need each wavelength-division-multiplexed optical signal is monitored in practical operation, the content of monitoring mainly comprises light frequency and luminous power.

Usually because the optical wavelength that laser ageing in the wavelength-division multiplex system or other factors cause launching departs from the standard wave length, this wavelength departure not only influences signal transfer quality, also influencing simultaneously the crosstalk effect between the different wave length passage, is necessary so optical wavelength is monitored.And in wavelength-division multiplex system, to use image intensifer usually, and because the light amplifying characteristic of different wave length is different, thus cause the luminous power of each wavelength inequality, so need to adopt optical power monitoring system.

In order to monitor simultaneously to the light signal of a plurality of wavelength, need to adopt demodulation multiplexer that the light signal of each wavelength is separated, waveguide array grating (Arrayed Waveguide Grating, be called for short AWG) type wavelength division multiplexing/demultiplexing (DWDM) device have channel spacing little, be easy to integrated with other device, volume is little, stable performance, be easy to produce in batches and characteristics that cost is low, and has obtained development fast.

Shown in Figure 1 is the schematic diagram of an AWG type wavelength demultiplexer, and planar waveguide 2 couples together waveguide 1 and waveguide array 3, and planar waveguide 4 couples together waveguide 5 and waveguide array 3.Waveguide 1 can be 1 or many, and Waveguide array 3 can have a lot of roots, surpasses 100 usually, and output waveguide 5 is general above two, chooses according to designing requirement.Two adjacent arbitrarily in waveguide array waveguide length differences are constant.Its wavelength (de) multiplexing principle is: one group of constant wavelength in interval is respectively λ ₁, λ ₂, λ ₃..., λ _I-1, λ _iLight from same input waveguide, import, they can be dispersed in waveguide 2, energy can be distributed in each Waveguide array 5, because the adjacent array waveguide has a fixing length difference, so light is when arriving waveguide 4 through Waveguide array in each Waveguide array, light in the adjacent array waveguide has a definite optical path difference, like this after by waveguide 4, can form interference pattern in waveguide 4 and waveguide 5 links, the point of maximum intensity position difference of the interference of light of different wave length, the position that output waveguide is connected with planar waveguide 5 is arranged on these interference point of maximum intensity, and the light of different wave length will be exported from different output waveguides like this, thereby has realized demultiplexing.Otherwise,,, after through the AWG structure, can export from same waveguide 1, thereby also can realize the wavelength multiplexing function if the light of different wave length is imported from corresponding output waveguide according to reversibility pricinple.

Concrete principle is, supposes that light incides in the central waveguide in the input waveguide, can obtain grating equation to be

n _SlabDsin θ+n _gΔ L=m λ, (1) wherein, n _SlabThe effective refractive index of representing planar waveguide 2 and 3, n _gBe the effective refractive index of Waveguide array, Δ L is the length difference of adjacent array waveguide, and λ is the incident light wavelength, and θ is the angle of diffraction of light in 3, and m is a diffraction progression, be integer, and d is the pitch of AWG.

The value λ of wavelength correspondence when θ is zero in the formula 1 ₀Be centre wavelength, it is defined as ${\mathrm{\λ}}_0=\frac{n_g\mathrm{\ΔL}}{m}.---\left(2\right)$

According to expression formula (1), near centre wavelength, just can obtain dispersion equation to the wavelength X differential $\frac{\mathrm{d\θ}}{\mathrm{d\λ}}=\frac{m(n_g-{\mathrm{\λdn}}_g/\mathrm{d\λ})}{{\mathrm{dn}}_{\mathrm{slab}}{n}_g}.---\left(3\right)$ According to expression formula (3), can see that the incident light of different wavelength has different wavefront directions, the position that focuses on output circle on the planar waveguide 4 is also just different so.

Find out from above and to utilize AWG type device with the light of the different wave length in the same waveguide separately so just can monitor the light of each wavelength.

License to Koga, people's such as Masafumi U.S. Pat 5617234, this patent utilization AWG device and detector array have designed a kind of module that can monitor simultaneously multichannel wavelength light frequency.The benefit of this method is to monitor wavelength, but can not monitor luminous power.

The scheme that licenses to the patent GB2346024 employing of Jeong-mee Kim and Yong-hoon Kang is claimed luminous power and the frequency that can monitor different wave length simultaneously.This scheme also is to use an AWG type demodulation multiplexer and a detector array to realize the signal monitoring function.AWG type demodulation multiplexer and Fig. 1 that he adopts are basic identical, just do not have output waveguide, have put detector array in the output waveguide 5 and the position of the junction of output planar waveguide 4.Utilize light distribution analyze frequency, light intensity and the optical signal noise ratio of detector array output waveguide of surveying 5 and the junction of exporting planar waveguide 4.In the AWG of reality design, the light of two wavelength that frequency is closed on is very little with the location interval of the junction imaging of output planar waveguide 4 in output waveguide 5, generally have only about 20 μ m, if want to utilize the output waveguide 5 and the light distribution degree of precision ground of the junction of output planar waveguide 4 to obtain the light intensity of frequency and each wavelength, require each detector in the detector array enough little, implement the comparison difficulty like this.

Summary of the invention

The purpose of this utility model is to overcome the problem and shortage that prior art exists, and a kind of multichannel wavelength light power and light frequency device for monitoring based on waveguide array grating is provided.

The purpose of this utility model is to realize like this.

As shown in Figure 2, this monitoring modular is made up of following parts, and its annexation is:

Output waveguide 5m is overlapping with standard wave length master's order of diffraction (m) image space of AWG wavelength division multiplexer with the link position of planar waveguide 4 outputs;

Output waveguide 5m-1 with standard wave length time displacement S of the order of diffraction (m-1) image space lateral shift of the link position of planar waveguide 4 outputs and AWG wavelength division multiplexer;

Output waveguide 5m+1 with standard wave length's time displacement of the order of diffraction (m+1) image space lateral shift-Δ S of the link position of planar waveguide 4 outputs and AWG wavelength division multiplexer;

The output waveguide 5m of the main order of diffraction of one group of corresponding A WG7 (m level) is connected with light intensity detector 12 respectively, and light intensity detector 12 is connected with computer 11 again;

Two groups output waveguide 5m-1, the 5m+1 of two orders of diffraction (m-1 level, m+1 level) of corresponding A WG7 are connected with two groups of light intensity detectors 12 respectively respectively; Wherein 12, two groups of amplifier 8a of two groups of light intensity detectors and 8b, 9, one groups of logarithm devices 10 of one group of divider, computer 11 are corresponding successively to be connected; Perhaps two groups of light intensity detectors 12 directly are connected with computer 11.

This monitoring modular course of work is as follows:

Optical wavelength is respectively λ ₁, λ ₂..., λ _N-1, λ _nEach Lu Guangcong waveguide 1 be input to AWG device 7, the light by each wavelength of AWG device 7 back all has m, m-1 and three pictures of m+1 level, wherein the picture of each wavelength m level outputs to light intensity detector array 12 by wavelength from output waveguide 5; The picture of each wavelength m-1 level and m+1 level then outputs to light intensity detector array 12 respectively from output waveguide 5m-1 and 5m+1 respectively by wavelength.The above light that passes through light intensity detector array 12 is converted to the signal of telecommunication, and these signals of telecommunication are again by different amplifying circuits 8.The light electrical signal converted at m-1 and m+1 level picture by same wavelength is input to the division processing that divider circuit 9 carries out signal, to the m-1 of same wavelength light signal and m+1 level do division arithmetic as electrical signal converted, the signal of telecommunication by division arithmetic carries out logarithm operation by logarithmic operational circuit 10 again.Through the signal of logarithm operation with all import computer from the signal of detector array 12 outputs and handle.So just can realize purpose that the frequency and the light intensity of different wave length signal are monitored.

As shown in Figure 3, this AWG device architecture is made up of following parts:

Has an input waveguide 1 at least, an input planar waveguide 2, output planar waveguide 4 with converging action, one connects the output of input planar waveguide 2 and the constant waveguide array 3 of input adjacent waveguide length difference of output planar waveguide 4, three groups of output waveguide 5m, 6m-1,6m+1, these three groups of output waveguides are connected with output planar waveguide 4.

Wherein 1 be with Fig. 1 in identical input waveguide 1; 2 and 4 be with Fig. 1 in identical planar waveguide 2 and 4; The 3rd, with a group pattern waveguide 3 identical among Fig. 1; 5m-1 is the waveguide of each wavelength picture of output m-1 level; 5m+1 is the waveguide of each wavelength picture of output m+1 level; 5m is the waveguide of each wavelength picture of output m level.

Above-mentioned parts connect from left to right successively: input waveguide 1, planar waveguide 2, Waveguide array 3, planar waveguide 4, output waveguide 5m-1,5m, 5m+1.

26S Proteasome Structure and Function to above-mentioned monitoring modular further specifies below.

A, power monitoring

In the design of this AWG, input waveguide 1 is a single mode waveguide, and the design of output waveguide 5m can be a single mode, also can be other shape.If output waveguide 5m is a single mode, the output spectra characteristic is a Gaussian so.The utility model also can adopt the output waveguide 5m of other shape to have the output characteristic of flat spectral response to realize it, a variety of for realizing that output spectrum is that smooth method has, as output waveguide 5m adopt than the multimode output waveguide of broad or between output waveguide 5m and planar waveguide 4 multiple-mode interfence structure of adding.Another method that adopted the utility model realizes the flatness of output spectrum response, promptly adds a trapezoidal coupler 13 between single mode output waveguide 5m and planar waveguide 4, and its structure as shown in Figure 4.This structure can obtain very wide 1dB pass band width.The concrete structure of trapezoidal coupler 13 as shown in Figure 5.

As shown in Figure 5, trapezoidal coupler 13 is made up of two trapezoidal waveguides 14 that occupy both sides and a trapezoidal waveguide 15 in the middle of occuping, and leaves the gap between trapezoidal waveguide 14 and the trapezoidal waveguide 15; The big or small two ends of trapezoidal waveguide 15 connect output waveguide 5m and planar waveguide 4 respectively, and the big end of trapezoidal waveguide 14 is connected with planar waveguide 4.

The designing requirement of trapezoidal coupler 13, when light wave from waveguide 5m input, when the link output of coupler 13 and planar waveguide 4, the luminous intensity of output has two peak structure; At the link of coupler 13 with planar waveguide 4, the position difference of the photoimaging of different wave length, and also the field of these pictures becomes Gaussian.The picture of different wave length smooth spectral response will occur with the field overlap integral of this two peak structure.The purpose that the output spectrum response is designed to flat type is in the wave-length coverage of broad, and their insertion loss all is the same, so just can carry out optical power monitoring in the wave-length coverage of broad.The flatness of realizing spectral response with trapezoidal coupler 13 waveguiding structures has several benefits: first, trapezoidal coupler is insensitive to wavelength in various coupled apparatuses, that is to say, in a very big wave-length coverage, the output field pattern of trapezoidal coupler 13 can remain unchanged, and spectral response has identical bandwidth in each output waveguide of AWG that can guarantee like this to design; The second, the bandwidth ratio broad of the spectral response of design.

B, frequency monitoring

Output waveguide 5m-1 and 5m+1 are single mode waveguides, so the response of their output spectrums all is a Gaussian, the light of different wave length is except imaging in waveguide 5m (m level), simultaneously also can be in waveguide 5m-1 (m-1 level) and waveguide 5m+1 (m+1 level) imaging, the light intensity among same output waveguide 5m-1 of different wave length optical coupling or the 5m+1 (also being known as transfer function) is $H\left(v\right)={\mathrm{\&eta;}}_i\exp \&lsqb;-4\mathrm{<figure-callout\; id="2"\; label="ln"\; filenames="Y0228452200121.png"\; state="\{\{state\}\}">ln</figure-callout>}2\&CenterDot;{\left(\frac{v-v_i}{\mathrm{\&Delta;v}}\right)}^2\&rsqb;,---\left(4\right)$

Wherein i is the sequence number of output waveguide, η _iBe attenuation constant, v is the frequency of light wave, V _iBe the centre frequency of this passage, Δ v is the half width of channel transfer spectrum, is constant.The respective channel centre frequency differs Δ V in each channel central frequency among the design's the output waveguide 5m-1 and the waveguide 5 ₀And the respective channel centre frequency differs-Δ V in each channel central frequency among the output waveguide 5m+1 and the output waveguide 5 ₀In order to achieve this end, when design output waveguide position, the choice of location of output waveguide 5m is in the position of standard wave length's's (being the ITU-T wavelength) m level picture, then and between the position of the m-1 level picture of respective standard wavelength (being the ITU-T wavelength) there is a shifted by delta S position of output waveguide 5m-1, then and between the position of the m+1 level picture of corresponding quasi wave long (being the ITU-T wavelength) there is a skew-Δ S position of output waveguide 5m+1, and the design arrangement of output waveguide position as shown in Figure 6.

Transfer function among waveguide 5m-1 and the waveguide 5m+1 is respectively like this $H_{6a}\left(v\right)={\mathrm{\&eta;}}_i\exp \&lsqb;-4\ln 2{\left(\frac{v-v_i-{\mathrm{\&Delta;v}}_0}{\mathrm{\&Delta;v}}\right)}^2\&rsqb;,---\left(5a\right)$ $H_{6b}\left(v\right)={\mathrm{\&eta;}}_i\exp \&lsqb;-4\ln 2{\left(\frac{v-v_i+{\mathrm{\&Delta;v}}_0}{\mathrm{\&Delta;v}}\right)}^2\&rsqb;.---\left(5b\right)$ They are carried out division and logarithm operation has $P=\ln \frac{H_{6a}\left(v\right)}{H_{6b}\left(v\right)}=-4\mathrm{<figure-callout\; id="2"\; label="ln"\; filenames="Y0228452200121.png"\; state="\{\{state\}\}">ln</figure-callout>}2\&CenterDot;{\left(\frac{v-v_i-{\mathrm{\&Delta;v}}_0}{\mathrm{\&Delta;v}}\right)}^2+4\mathrm{<figure-callout\; id="2"\; label="ln"\; filenames="Y0228452200121.png"\; state="\{\{state\}\}">ln</figure-callout>}2\&CenterDot;{\left(\frac{v-v_i-{\mathrm{\&Delta;v}}_0}{\mathrm{\&Delta;v}}\right)}^2$ $\&ap;8\mathrm{<figure-callout\; id="2"\; label="ln"\; filenames="Y0228452200121.png"\; state="\{\{state\}\}">ln</figure-callout>}2\&times;\left(\frac{{\mathrm{\&Delta;v}}_0}{\mathrm{\&Delta;v}}\right)\frac{\mathrm{\&delta;v}}{\mathrm{\&Delta;v}},---\left(6\right)$ Wherein δ v is the actual frequency of the light wave propagated and the deviation of standard frequency.Described in (6) formula, the light intensity magnitude among signal P and waveguide 5m-1 and the waveguide 5m+1 is irrelevant, and that is to say if the light wave of importing changes also to influence the size of signal P.And signal P almost is directly proportional with δ v, so just can monitor the actual frequency of light wave and the deviation size of standard frequency according to the size of the signal P that records.

Practical design as shown in Figure 2, waveguide 5m-1 and 5m+1 are coupled with detector array respectively, light in each passage among the waveguide 5m-1 is being converted to the signal of telecommunication through after the corresponding detector, light in each passage among the waveguide 5m+1 is being converted to the signal of telecommunication through after the corresponding detector, after through amplifying circuit 8a and 8b, output to same division circuit 9 by identical wavelength light signal electrical signal converted among waveguide 5m-1 and the 5m+1 and carry out division arithmetic, signal through division arithmetic carries out logarithm operation through logarithmic circuit 10 again, so just can obtain signal P, just can judge that according to the size of P value this light frequency departs from the size of standard frequency.Signal P input computer just handled to carry out control corresponding.Also just can monitor afterwards these wavelength departures standard wave length's size through same processing by the signal of telecommunication of other wavelength light conversion of signals.

The purpose that adopts amplifying circuit 8a and 8b in the design is in order to guarantee that the signal P that exports during for the standard wave length when input optical wavelength is zero.Because the reason of design or technology can cause the dissipation constant η among waveguide 5m-1 and the 5m+1 _iUnequal, the amplification coefficient of regulating amplifying circuit 8a and 8b just can reach the dissipation constant η that regulates among waveguide 5m-1 and the 5m+1 _iPurpose, make them equate, thereby realize that the signal P that exports during for the standard wave length when input optical wavelength is zero purpose.

Certainly, simultaneously during monitoring system, can be coupled into a reference light frequency in this luminous power light frequency of design in input signal, this is stable with reference to light frequency.The output signal P corresponding with this reference light frequency just can monitor the operating state of AWG own by monitoring, if this moment, the output signal P corresponding with this reference light frequency departed from zero, by the bias that records AWG is carried out temperature control so, the temperature of regulating AWG makes the output signal P corresponding with this reference light frequency get back to zero, can guarantee that like this AWG is in normal operating conditions.

The utlity model has following advantage and good effect:

1. can monitor different wave length light frequency and light intensity simultaneously.

2. implement fairly simplely, and be suitable for integrated.

3. this monitoring modular integrated level height, the technology maturation, volume is little, dependable performance.

Description of drawings

Fig. 1-AWG type wavelength-division demultiplexing fundamental diagram;

Fig. 2-the utility model monitoring modular block diagram;

Fig. 3-be used for AWG wavelength division multiplexer of the present utility model;

Fig. 4-with AWG wavelength division multiplexer master order of diffraction corresponding output channel structure chart of the present utility model;

Fig. 5-AWG wavelength division multiplexer master order of diffraction corresponding output channel structure chart single and of the present utility model;

Wherein:

The 1-input waveguide is used for propagating input light;

2-planar waveguide, light can freely be propagated therein, have the effect that light is dispersed;

3-Waveguide array, the i.e. Waveguide array that is arranged side by side and forms by many waveguides;

4-planar waveguide, light can freely be propagated therein, have the effect that light is dispersed;

5-output waveguide, the i.e. output waveguide that is arranged side by side of AWG wavelength division multiplexer;

5m-some with the corresponding output waveguide that is arranged side by side of AWG wavelength division multiplexer master order of diffraction m;

5m-1-some with the AWG wavelength division multiplexer time corresponding output waveguide that is arranged side by side of order of diffraction m-1;

5m+1-some with the AWG wavelength division multiplexer time corresponding output waveguide that is arranged side by side of order of diffraction m+1;

The 7-AWG device;

The 8a-amplifying circuit, well-known device;

The 8b-amplifying circuit, well-known device;

The 9-divider, well-known device;

10-logarithm device, well-known device;

The 11-computer, present embodiment is selected PC for use;

The 12-light intensity detector, present embodiment is selected photodiode for use;

The trapezoidal coupler of 13-;

The 14-trapezoidal waveguide occupy the both sides of trapezoidal coupler;

The 15-trapezoidal waveguide occupy the centre of trapezoidal coupler.

Fig. 6-output waveguide the position view corresponding with each order of diffraction of AWG wavelength division multiplexer;

Fig. 7-have the circuit theory diagrams of division and logarithm operation, wherein:

U ₁, U ₂-input signal, U ₃-output signal, the G-triode, R-resistance,

The F-integrated amplifier, C ₁, C ₂, C ₃-constant.

Embodiment

What Fig. 2 represented only is a schematic diagram, when actual design, not necessarily adopt the Circuits System of logarithm behind the first division shown in Figure 2, as long as division and logarithm operation that energy perfect (6) formula is represented, adopt in an embodiment and earlier each signal is carried out logarithm operation, then the corresponding signal after the computing is carried out the circuit of differential summation, as shown in Figure 7.

The division of signal and logarithm operation also can adopt software to finish in practical design.That is to say the signal of amplifying circuit 8a and 8b output is directly imported computer that the software program by computer carries out division and logarithm operation, and is slower than hardware (division and logarithmic operational circuit) on processing speed so certainly.

Comprehensive above design has just constituted the represented luminous power light frequency while monitoring system of Fig. 2.This design has effectively utilized the m of AWG type wavelength division multiplexer, m-1, and the light signal of m+1 level, and can realize integratedly, can reduce the volume and the cost of optical property monitoring modular so greatly.

As embodiment, in the design, trapezoidal coupler 13 adopts:

Sandwich layer refractive index and coating refringence are 0.75%;

Waveguide cross-sectional dimensions is 6 * 6 μ m ²

The width of trapezoidal waveguide 15 small ends is 3 μ m;

Gap between trapezoidal waveguide 14 and the trapezoidal waveguide 15 is 2 μ m;

The width of trapezoidal waveguide 14 big ends is 5 μ m, and the width of small end is 2 μ m;

The length of trapezoidal waveguide 15 and trapezoidal waveguide 14 all is 800 μ m.

Certainly, above-mentioned parameter is an embodiment, and the professional and technical personnel can easily choose other parameter according to the spirit of the utility model patent.

Claims (3)

1, a kind of multichannel wavelength light power and light frequency device for monitoring based on waveguide array grating, comprise AWG wavelength division multiplexer (7), AWG wavelength division multiplexer (7) has an input waveguide (1) at least, an input planar waveguide (2), output planar waveguide (4) with converging action, one connects the output of input planar waveguide (2) and the input and the constant waveguide array (3) of adjacent waveguide length difference of output planar waveguide (4), three groups of output waveguides (5m), (5m-1), (5m+1), these three groups of output waveguides are connected with output planar waveguide (4);

It is characterized in that being made up of following parts, its annexation is:

Output waveguide (5m) is overlapping with standard wave length master's order of diffraction (m level) image space of AWG wavelength division multiplexer with the link position of planar waveguide (4) output;

Output waveguide (5m-1) with standard wave length time displacement S of the order of diffraction (m-1) image space lateral shift of the link position of planar waveguide (4) output and AWG wavelength division multiplexer;

Output waveguide (5m+1) with standard wave length's time displacement of the order of diffraction (m+1) image space lateral shift-Δ S of the link position of planar waveguide (4) output and AWG wavelength division multiplexer;

The output waveguide (5m) of the main order of diffraction of one group of corresponding A WG7 (m level) is connected with light intensity detector (12) respectively, and light intensity detector (12) is connected with computer (11) again;

Two groups output waveguide (5m-1), (5m+1) of two orders of diffraction (m-1 level, m+1 level) of corresponding A WG7 are connected with two groups of light intensity detectors (12) respectively respectively; Two groups of light intensity detectors (12) wherein, two groups of amplifiers (8a) and (8b), one group of divider (9), one group of logarithm device (10), computer (11) are corresponding successively to be connected; Perhaps two groups of light intensity detectors (12) directly are connected with computer (11).

2, by right 1 described a kind of multichannel wavelength light power and light frequency device for monitoring based on waveguide array grating, it is characterized in that: between single mode output waveguide (5m) and planar waveguide (4) or when adding the trapezoidal coupler (13) of a function with the flat spectral response of obtaining, trapezoidal coupler (13) by two trapezoidal waveguides (14) that occupy both sides and occupy in the middle of a trapezoidal waveguide (15) form, leave the gap between trapezoidal waveguide (14) and the trapezoidal waveguide (15); The big or small two ends of trapezoidal waveguide (15) connect output waveguide (5) and planar waveguide (4) respectively, and the big end of trapezoidal waveguide (14) is connected with planar waveguide (4).

3, by right 1 described a kind of multichannel wavelength light power and light frequency device for monitoring, it is characterized in that: directly single mode output waveguide (5m) is connected with planar waveguide (4) based on waveguide array grating.

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