CN105319740A - Principle for manufacturing of long-wavelength optical isolator and long-wavelength optical isolator adopting principle - Google Patents

Abstract

The invention provides a principle for manufacturing of a long-wavelength optical isolator and the long-wavelength optical isolator adopting the principle and aims to solve the problem that the applicable wavelength of existing optical isolators is short. The long-wavelength optical isolator comprises an outer encapsulation pipe and a magnetic ring, wherein the magnetic ring is sleeved with the outer encapsulation pipe, and an isolation chip is connected in the magnetic ring in an adhesive manner. The long-wavelength optical isolator is characterized in that the isolation chip comprises an incidence polarizing film, at least two Faraday optical rotation bodies and an emitting polarizing film which bond together through optical adhesives and are stacked. Various high-wavelength effects are realized flexibly through multiple common short-wavelength Faraday optical rotation bodies, the cost is reduced, and the production cycle is shortened.

Description

Make the principle of long wavelength light isolator and adopt long wavelength's isolator of this principle

Technical field

The present invention relates to the optical device in optical-fibre communications field, particularly a kind ofly make the principle of long wavelength light isolator and adopt long wavelength's isolator of this principle.

Background technology

The purposes of free space isolator is the harmful effect preventing the reverse transfers light produced due to a variety of causes in light path from producing light source and light path system.Be mainly used in optical transmission system (product is as: light transmitting-receiving emitter etc.) and individual laser package (product as: laser diode module, fiber instrument instrument etc.).Along with the fast development of domestic and international optical communication industry, the field of application is more and more extensive.And traditional free space isolator wavelength coverage can only reach 1610nm, the isolator of the higher wavelength needed in practical application cannot reach.

The detection of harmful gas, be always the whole world all in the common difficulty of active research and solution, traditional detection mode is limited to equipment volume, it is inaccurate to measure, and the shortcoming such as must to contact.According to the spectral characteristic of harmful gas, the principle that its vibration frequency is consistent with 1650 ~ 2000nm spectral characteristic, need use the isolator of high wavelength, be assemblied in laser instrument, guarantee accurate measurement.

Summary of the invention

The invention provides and a kind ofly make the principle of long wavelength light isolator and adopt long wavelength's isolator of this principle, to solve the short problem of existing optoisolator applicable wavelengths.

Technical scheme of the present invention is achieved in that

Make a principle for long wavelength light isolator, described optoisolator comprises incident polarizer, m sheet Faraday body, outgoing polarization sheet and magnet ring, when wavelength is λ ₀light forward when passing through:

$E_{\mathrm{out}}=P_{\mathrm{out}}\left[{\mathrm{\Π}}_m^{i=1}M\left({\mathrm{\λ}}_i\right)\right]P_{\mathrm{in}}{E}_{\mathrm{in}}---\left(1\right)$

Wherein

$E_{\mathrm{in}}=\left[\begin{array}{c}{E}_0\\ 0\end{array}\right]$ For the incident light electric field of horizontal polarization

$P_{\mathrm{in}}\left(0\right)=\left[\begin{array}{cc}1& 0\\ 0& 0\end{array}\right]$ For the incident polarizer of horizontal positioned

$M\left({\mathrm{\λ}}_i\right)=\left[\begin{array}{cc}\cos (\mathrm{\π}{\mathrm{\λ}}_i/{4\mathrm{\λ}}_0)& -\sin ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)\\ \sin ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)& \cos ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)\end{array}\right]$ For short wavelength λ _i45 degree of faraday rotators

$P_{\mathrm{out}}=\left[\begin{array}{cc}{\sin }^2{\mathrm{\θ}}_0& \sin {\mathrm{\θ}}_0\cos {\mathrm{\θ}}_0\\ \sin {\mathrm{\θ}}_0\cos {\mathrm{\θ}}_0& {\cos }^2{\mathrm{\θ}}_0\end{array}\right]$ For θ ₀the outgoing polarization sheet that angle is placed

Bring into above various, and notice

${\mathrm{\Π}}_m^{i=1}M\left({\mathrm{\λ}}_i\right)=M\left({\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i\right)$

The forward transmitance T of isolator is

$T={|E_{\mathrm{out}}/E_{\mathrm{in}}|}^2=\sin ({\mathrm{\θ}}_0+\frac{\mathrm{\π}}{{4\mathrm{\λ}}_0}{\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i)---\left(2\right)$

In like manner, along θ ₀direction polarization feedback light back through time, feedback light is expressed as through electric field

$E_{\mathrm{iso}}=P_{\mathrm{in}}\left[{\mathrm{\Π}}_1^{i=m}M\left({\mathrm{\λ}}_i\right)\right]P_{\mathrm{out}}{E}_{\mathrm{Ref}}---\left(3\right)$

Wherein $E_{\mathrm{ref}}=\left[\begin{array}{c}\sin {\mathrm{\θ}}_0\\ \cos {\mathrm{\θ}}_0\end{array}\right]$ E ₀for polarization direction is θ ₀feedback light electric field

Can be derived as from above formula back through rate R:

$R{|E_{\mathrm{iso}}/E_{\mathrm{ref}}|}^2=\sin ({\mathrm{\θ}}_0-\frac{\mathrm{\π}}{{4\mathrm{\λ}}_0}{\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i)---\left(4\right)$

By desirable isolator condition R=0 and T=1, draw

θ ₀＝45°， ${\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i={\mathrm{N\λ}}_0---\left(5\right)$

N is odd number, from formula 5, by multi-disc short wavelength Faraday body, can realize long wavelength light insulator functionality.

A kind of optoisolator adopting above-mentioned principle, comprise external package pipe and magnet ring, described magnet ring is socketed in described external package pipe, isolating chip is bonded with in described magnet ring, described isolating chip is made up of the incident polarizer overlayed together, Faraday body and outgoing polarization sheet optical adhesive bonding, and the quantity of described Faraday body is at least two.

Wherein, preferably, the quantity of described Faraday body is two, and two Faraday bodies are respectively the Faraday body that wavelength is 825nm.

Wherein, preferably, the quantity of described Faraday body is two, and two Faraday bodies are respectively the Faraday body that wavelength is 862.5nm.

Wherein, preferably, the quantity of described Faraday body is three, and three Faraday bodies are respectively the Faraday body that wavelength is 599nm.

Wherein, preferably, the quantity of described Faraday body is three, and three Faraday bodies are respectively the Faraday body that wavelength is 581nm.

Wherein, preferably, the quantity of described Faraday body is four, and four Faraday bodies are respectively the Faraday body that wavelength is 470nm.

Wherein, preferably, the quantity of described Faraday body is four, and four Faraday bodies are respectively the Faraday body that wavelength is 500nm.

Wherein, preferably, the xsect of described incident polarizer, described Faraday body and outgoing polarization sheet is square.

Wherein, preferably, the joint portion of described magnet ring and described isolating chip is provided with steel loop, described steel loop and seamless between described magnet ring and described isolating chip.

Beneficial effect of the present invention:

1. the present invention realizes the effect of the high wavelength of various difference flexibly by multi-disc common short wavelength Faraday body, and reduces costs, and shortens the production cycle.

2. the present invention by installing stainless steel ring additional between magnet ring and chip, covers gap, avoids gap light leak and the drawback filling up glue inefficiency, unstable properties.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the sectional view of the embodiment of the present invention 1;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the sectional view of the embodiment of the present invention 2;

Fig. 4 is the vertical view of Fig. 3;

Fig. 5 is the sectional view of the embodiment of the present invention 3;

Fig. 6 is the sectional view of the embodiment of the present invention 4;

Fig. 7 is the sectional view of the embodiment of the present invention 5;

Fig. 8 is the sectional view of the embodiment of the present invention 6.

In figure, 1. external package pipe, 2. magnet ring, 3. isolating chip, 31. incident polarizer, 32. Faraday bodies, 33. outgoing polarization sheets, 34. optical adhesives, 4. steel loop

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

Embodiment 1

Make a principle for long wavelength light isolator, described optoisolator comprises incident polarizer 31, m sheet Faraday body 32, outgoing polarization sheet 33 and magnet ring 2, when wavelength is λ ₀light forward when passing through:

$E_{\mathrm{out}}=P_{\mathrm{out}}\left[{\mathrm{\Π}}_m^{i=1}M\left({\mathrm{\λ}}_i\right)\right]P_{\mathrm{in}}{E}_{\mathrm{in}}---\left(1\right)$

Wherein

$E_{\mathrm{in}}=\left[\begin{array}{c}{E}_0\\ 0\end{array}\right]$ For the incident light electric field of horizontal polarization

$P_{\mathrm{in}}\left(0\right)=\left[\begin{array}{cc}1& 0\\ 0& 0\end{array}\right]$ For the incident polarizer 31 of horizontal positioned

$M\left({\mathrm{\λ}}_i\right)=\left[\begin{array}{cc}\cos (\mathrm{\π}{\mathrm{\λ}}_i/{4\mathrm{\λ}}_0)& -\sin ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)\\ \sin ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)& \cos ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)\end{array}\right]$ For short wavelength λ _i45 degree of faraday rotators

$P_{\mathrm{out}}=\left[\begin{array}{cc}{\sin }^2{\mathrm{\θ}}_0& \sin {\mathrm{\θ}}_0\cos {\mathrm{\θ}}_0\\ \sin {\mathrm{\θ}}_0\cos {\mathrm{\θ}}_0& {\cos }^2{\mathrm{\θ}}_0\end{array}\right]$ For θ ₀the outgoing polarization sheet 33 that angle is placed

Bring into above various, and notice

${\mathrm{\Π}}_m^{i=1}M\left({\mathrm{\λ}}_i\right)=M\left({\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i\right)$

The forward transmitance T of isolator is

$T={|E_{\mathrm{out}}/E_{\mathrm{in}}|}^2=\sin ({\mathrm{\θ}}_0+\frac{\mathrm{\π}}{{4\mathrm{\λ}}_0}{\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i)---\left(2\right)$

In like manner, along θ ₀direction polarization feedback light back through time, feedback light is expressed as through electric field

$E_{\mathrm{iso}}=P_{\mathrm{in}}\left[{\mathrm{\Π}}_1^{i=m}M\left({\mathrm{\λ}}_i\right)\right]P_{\mathrm{out}}{E}_{\mathrm{Ref}}---\left(3\right)$

Wherein $E_{\mathrm{ref}}=\left[\begin{array}{c}\sin {\mathrm{\θ}}_0\\ \cos {\mathrm{\θ}}_0\end{array}\right]$ E ₀for polarization direction is θ ₀feedback light electric field

Can be derived as from above formula back through rate R:

$R{|E_{\mathrm{iso}}/E_{\mathrm{ref}}|}^2=\sin ({\mathrm{\θ}}_0-\frac{\mathrm{\π}}{{4\mathrm{\λ}}_0}{\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i)---\left(4\right)$

By desirable isolator condition R=0 and T=1, draw

θ ₀＝45°， ${\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i={\mathrm{N\λ}}_0---\left(5\right)$

N is odd number, from formula 5, by short wavelength's Faraday body 32 of two panels 825nm, can realize the long wavelength light insulator functionality of 1650nm.

As depicted in figs. 1 and 2, the present embodiment also provides a kind of optoisolator adopting above-mentioned principle, comprise external package pipe 1 and magnet ring 2, magnet ring 2 is socketed in external package pipe 1, be bonded with isolating chip in magnet ring 2, isolating chip is bonded by optical adhesive 34 and is made up of the incident polarizer 31 overlayed together, Faraday body 32 and outgoing polarization sheet 33.

Wherein, the quantity of Faraday body 32 is two, and two Faraday bodies 32 are respectively the Faraday body 32 that wavelength is 825nm.

Wherein, the xsect of incident polarizer 31, Faraday body 32 and outgoing polarization sheet 33 is square.

The present embodiment realizes the isolator demand of 1650nm height wavelength by two panels 825nm short wavelength Faraday body 32, thus reduces costs the shortening cycle.

Embodiment 2

Make a principle for long wavelength light isolator, described optoisolator comprises incident polarizer 31, m sheet Faraday body 32, outgoing polarization sheet 33 and magnet ring 2, when wavelength is λ ₀light forward when passing through:

$E_{\mathrm{out}}=P_{\mathrm{out}}\left[{\mathrm{\Π}}_m^{i=1}M\left({\mathrm{\λ}}_i\right)\right]P_{\mathrm{in}}{E}_{\mathrm{in}}---\left(1\right)$

Wherein

$E_{\mathrm{in}}=\left[\begin{array}{c}{E}_0\\ 0\end{array}\right]$ For the incident light electric field of horizontal polarization

$P_{\mathrm{in}}\left(0\right)=\left[\begin{array}{cc}1& 0\\ 0& 0\end{array}\right]$ For the incident polarizer 31 of horizontal positioned

$M\left({\mathrm{\λ}}_i\right)=\left[\begin{array}{cc}\cos (\mathrm{\π}{\mathrm{\λ}}_i/{4\mathrm{\λ}}_0)& -\sin ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)\\ \sin ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)& \cos ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)\end{array}\right]$ For short wavelength λ _i45 degree of faraday rotators

$P_{\mathrm{out}}=\left[\begin{array}{cc}{\sin }^2{\mathrm{\θ}}_0& \sin {\mathrm{\θ}}_0\cos {\mathrm{\θ}}_0\\ \sin {\mathrm{\θ}}_0\cos {\mathrm{\θ}}_0& {\cos }^2{\mathrm{\θ}}_0\end{array}\right]$ For θ ₀the outgoing polarization sheet 33 that angle is placed

Bring into above various, and notice

${\mathrm{\Π}}_m^{i=1}M\left({\mathrm{\λ}}_i\right)=M\left({\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i\right)$

The forward transmitance T of isolator is

$T={|E_{\mathrm{out}}/E_{\mathrm{in}}|}^2=\sin ({\mathrm{\θ}}_0+\frac{\mathrm{\π}}{{4\mathrm{\λ}}_0}{\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i)---\left(2\right)$

In like manner, along θ ₀direction polarization feedback light back through time, feedback light is expressed as through electric field

$E_{\mathrm{iso}}=P_{\mathrm{in}}\left[{\mathrm{\Π}}_1^{i=m}M\left({\mathrm{\λ}}_i\right)\right]P_{\mathrm{out}}{E}_{\mathrm{Ref}}---\left(3\right)$

Wherein $E_{\mathrm{ref}}=\left[\begin{array}{c}\sin {\mathrm{\θ}}_0\\ \cos {\mathrm{\θ}}_0\end{array}\right]$ E ₀for polarization direction is θ ₀feedback light electric field

Can be derived as from above formula back through rate R:

$R{|E_{\mathrm{iso}}/E_{\mathrm{ref}}|}^2=\sin ({\mathrm{\θ}}_0-\frac{\mathrm{\π}}{{4\mathrm{\λ}}_0}{\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i)---\left(4\right)$

By desirable isolator condition R=0 and T=1, draw

θ ₀＝45°， ${\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i={\mathrm{N\λ}}_0---\left(5\right)$

N is odd number, from formula 5, by short wavelength's Faraday body 32 of two panels 862.5nm, can realize the long wavelength light insulator functionality of 1725nm.

As shown in Figure 3 and Figure 4, the present embodiment also provides a kind of optoisolator adopting above-mentioned principle, comprise external package pipe 1 and magnet ring 2, magnet ring 2 is socketed in external package pipe 1, be bonded with isolating chip in magnet ring 2, isolating chip is bonded by optical adhesive 34 and is made up of the incident polarizer 31 overlayed together, Faraday body 32 and outgoing polarization sheet 33.

Wherein, the quantity of Faraday body 32 is 2, and two Faraday bodies 32 are respectively the Faraday body 32 that wavelength is 862.5nm.

Wherein, the xsect of incident polarizer 31, Faraday body 32 and outgoing polarization sheet 33 is square.

Further, magnet ring 2 is provided with steel loop 4 with the joint portion of isolating chip, steel loop 4 and seamless between magnet ring 2 and isolating chip, steel loop 4 internal diameter and the effective light hole of long wavelength's isolator measure-alike.Between magnet ring 2 and chip, install stainless steel ring 4 additional, cover gap, avoid gap light leak and the drawback filling up glue inefficiency, unstable properties.

The present embodiment realizes the isolator demand of 1725nm height wavelength by two panels 862.5nm short wavelength Faraday body 32, thus reduces costs the shortening cycle.

Embodiment 3

Make a principle for long wavelength light isolator, described optoisolator comprises incident polarizer 31, m sheet Faraday body 32, outgoing polarization sheet 33 and magnet ring 2, when wavelength is λ ₀light forward when passing through:

$E_{\mathrm{out}}=P_{\mathrm{out}}\left[{\mathrm{\Π}}_m^{i=1}M\left({\mathrm{\λ}}_i\right)\right]P_{\mathrm{in}}{E}_{\mathrm{in}}---\left(1\right)$

Wherein

$E_{\mathrm{in}}=\left[\begin{array}{c}{E}_0\\ 0\end{array}\right]$ For the incident light electric field of horizontal polarization

$P_{\mathrm{in}}\left(0\right)=\left[\begin{array}{cc}1& 0\\ 0& 0\end{array}\right]$ For the incident polarizer 31 of horizontal positioned

$M\left({\mathrm{\λ}}_i\right)=\left[\begin{array}{cc}\cos (\mathrm{\π}{\mathrm{\λ}}_i/{4\mathrm{\λ}}_0)& -\sin ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)\\ \sin ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)& \cos ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)\end{array}\right]$ For short wavelength λ _i45 degree of faraday rotators

$P_{\mathrm{out}}=\left[\begin{array}{cc}{\sin }^2{\mathrm{\θ}}_0& \sin {\mathrm{\θ}}_0\cos {\mathrm{\θ}}_0\\ \sin {\mathrm{\θ}}_0\cos {\mathrm{\θ}}_0& {\cos }^2{\mathrm{\θ}}_0\end{array}\right]$ For θ ₀the outgoing polarization sheet 33 that angle is placed

Bring into above various, and notice

${\mathrm{\Π}}_m^{i=1}M\left({\mathrm{\λ}}_i\right)=M\left({\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i\right)$

The forward transmitance T of isolator is

$T={|E_{\mathrm{out}}/E_{\mathrm{in}}|}^2=\sin ({\mathrm{\θ}}_0+\frac{\mathrm{\π}}{{4\mathrm{\λ}}_0}{\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i)---\left(2\right)$

In like manner, along θ ₀direction polarization feedback light back through time, feedback light is expressed as through electric field

$E_{\mathrm{iso}}=P_{\mathrm{in}}\left[{\mathrm{\Π}}_1^{i=m}M\left({\mathrm{\λ}}_i\right)\right]P_{\mathrm{out}}{E}_{\mathrm{Ref}}---\left(3\right)$

Wherein $E_{\mathrm{ref}}=\left[\begin{array}{c}\sin {\mathrm{\θ}}_0\\ \cos {\mathrm{\θ}}_0\end{array}\right]$ E ₀for polarization direction is θ ₀feedback light electric field

Can be derived as from above formula back through rate R:

$R{|E_{\mathrm{iso}}/E_{\mathrm{ref}}|}^2=\sin ({\mathrm{\θ}}_0-\frac{\mathrm{\π}}{{4\mathrm{\λ}}_0}{\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i)---\left(4\right)$

By desirable isolator condition R=0 and T=1, draw

θ ₀＝45°， ${\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i={\mathrm{N\λ}}_0---\left(5\right)$

N is odd number, from formula 5, by short wavelength's Faraday body 32 of three 581nm, can realize the long wavelength light insulator functionality of 1743nm.

As shown in Figure 5, the present embodiment also provides a kind of optoisolator adopting above-mentioned principle, comprise external package pipe 1 and magnet ring 2, magnet ring 2 is socketed in external package pipe 1, be bonded with isolating chip in magnet ring 2, isolating chip is bonded by optical adhesive 34 and is made up of the incident polarizer 31 overlayed together, Faraday body 32 and outgoing polarization sheet 33.

Wherein, the quantity of Faraday body 32 is three, and three Faraday bodies 32 are respectively the Faraday body 32 that wavelength is 581nm.

Wherein, the xsect of incident polarizer 31, Faraday body 32 and outgoing polarization sheet 33 is square.

The present embodiment realizes the isolator demand of 1743nm height wavelength by three 581nm short wavelength's Faraday bodies 32, thus reduces costs the shortening cycle.

The vertical view of the present embodiment is identical with Fig. 2, therefore, in Figure of description content, does not repeat accompanying drawing.

Embodiment 4

Make a principle for long wavelength light isolator, described optoisolator comprises incident polarizer 31, m sheet Faraday body 32, outgoing polarization sheet 33 and magnet ring 2, when wavelength is λ ₀light forward when passing through:

$E_{\mathrm{out}}=P_{\mathrm{out}}\left[{\mathrm{\Π}}_m^{i=1}M\left({\mathrm{\λ}}_i\right)\right]P_{\mathrm{in}}{E}_{\mathrm{in}}---\left(1\right)$

Wherein

$E_{\mathrm{in}}=\left[\begin{array}{c}{E}_0\\ 0\end{array}\right]$ For the incident light electric field of horizontal polarization

$P_{\mathrm{in}}\left(0\right)=\left[\begin{array}{cc}1& 0\\ 0& 0\end{array}\right]$ For the incident polarizer 31 of horizontal positioned

$M\left({\mathrm{\λ}}_i\right)=\left[\begin{array}{cc}\cos (\mathrm{\π}{\mathrm{\λ}}_i/{4\mathrm{\λ}}_0)& -\sin ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)\\ \sin ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)& \cos ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)\end{array}\right]$ For short wavelength λ _i45 degree of faraday rotators

$P_{\mathrm{out}}=\left[\begin{array}{cc}{\sin }^2{\mathrm{\θ}}_0& \sin {\mathrm{\θ}}_0\cos {\mathrm{\θ}}_0\\ \sin {\mathrm{\θ}}_0\cos {\mathrm{\θ}}_0& {\cos }^2{\mathrm{\θ}}_0\end{array}\right]$ For θ ₀the outgoing polarization sheet 33 that angle is placed

Bring into above various, and notice

${\mathrm{\Π}}_m^{i=1}M\left({\mathrm{\λ}}_i\right)=M\left({\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i\right)$

The forward transmitance T of isolator is

$T={|E_{\mathrm{out}}/E_{\mathrm{in}}|}^2=\sin ({\mathrm{\θ}}_0+\frac{\mathrm{\π}}{{4\mathrm{\λ}}_0}{\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i)---\left(2\right)$

In like manner, along θ ₀direction polarization feedback light back through time, feedback light is expressed as through electric field

$E_{\mathrm{iso}}=P_{\mathrm{in}}\left[{\mathrm{\Π}}_1^{i=m}M\left({\mathrm{\λ}}_i\right)\right]P_{\mathrm{out}}{E}_{\mathrm{Ref}}---\left(3\right)$

Wherein $E_{\mathrm{ref}}=\left[\begin{array}{c}\sin {\mathrm{\θ}}_0\\ \cos {\mathrm{\θ}}_0\end{array}\right]$ E ₀for polarization direction is θ ₀feedback light electric field

Can be derived as from above formula back through rate R:

$R{|E_{\mathrm{iso}}/E_{\mathrm{ref}}|}^2=\sin ({\mathrm{\θ}}_0-\frac{\mathrm{\π}}{{4\mathrm{\λ}}_0}{\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i)---\left(4\right)$

By desirable isolator condition R=0 and T=1, draw

θ ₀＝45°， ${\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i={\mathrm{N\λ}}_0---\left(5\right)$

N is odd number, from formula 5, by short wavelength's Faraday body 32 of three 599nm, can realize the long wavelength light insulator functionality of 1795nm.

As shown in Figure 6, the present embodiment also provides a kind of optoisolator adopting above-mentioned principle, comprise external package pipe 1 and magnet ring 2, magnet ring 2 is socketed in external package pipe 1, be bonded with isolating chip in magnet ring 2, isolating chip is bonded by optical adhesive 34 and is made up of the incident polarizer 31 overlayed together, Faraday body 32 and outgoing polarization sheet 33.

Wherein, the quantity of Faraday body 32 is 3, and two Faraday bodies 32 are respectively the Faraday body 32 that wavelength is 599nm.

Wherein, the xsect of incident polarizer 31, Faraday body 32 and outgoing polarization sheet 33 is square.

Further, magnet ring 2 is provided with steel loop 4 with the joint portion of isolating chip, steel loop 4 and seamless between magnet ring 2 and isolating chip, steel loop 4 internal diameter and the effective light hole of long wavelength's isolator measure-alike.Between magnet ring 2 and chip, install stainless steel ring 4 additional, cover gap, avoid gap light leak and the drawback filling up glue inefficiency, unstable properties.

The present embodiment realizes the isolator demand of 1795nm height wavelength by three 599nm short wavelength's Faraday bodies 32, thus reduces costs the shortening cycle.

The stereographic map of the present embodiment is identical with Fig. 4, therefore, in Figure of description content, does not repeat accompanying drawing.

Embodiment 5

Make a principle for long wavelength light isolator, described optoisolator comprises incident polarizer 31, m sheet Faraday body 32, outgoing polarization sheet 33 and magnet ring 2, when wavelength is λ ₀light forward when passing through:

$E_{\mathrm{out}}=P_{\mathrm{out}}\left[{\mathrm{\Π}}_m^{i=1}M\left({\mathrm{\λ}}_i\right)\right]P_{\mathrm{in}}{E}_{\mathrm{in}}---\left(1\right)$

Wherein

$E_{\mathrm{in}}=\left[\begin{array}{c}{E}_0\\ 0\end{array}\right]$ For the incident light electric field of horizontal polarization

$P_{\mathrm{in}}\left(0\right)=\left[\begin{array}{cc}1& 0\\ 0& 0\end{array}\right]$ For the incident polarizer 31 of horizontal positioned

$M\left({\mathrm{\λ}}_i\right)=\left[\begin{array}{cc}\cos (\mathrm{\π}{\mathrm{\λ}}_i/{4\mathrm{\λ}}_0)& -\sin ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)\\ \sin ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)& \cos ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)\end{array}\right]$ For short wavelength λ _i45 degree of faraday rotators

$P_{\mathrm{out}}=\left[\begin{array}{cc}{\sin }^2{\mathrm{\θ}}_0& \sin {\mathrm{\θ}}_0\cos {\mathrm{\θ}}_0\\ \sin {\mathrm{\θ}}_0\cos {\mathrm{\θ}}_0& {\cos }^2{\mathrm{\θ}}_0\end{array}\right]$ For θ ₀the outgoing polarization sheet 33 that angle is placed

Bring into above various, and notice

${\mathrm{\Π}}_m^{i=1}M\left({\mathrm{\λ}}_i\right)=M\left({\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i\right)$

The forward transmitance T of isolator is

$T={|E_{\mathrm{out}}/E_{\mathrm{in}}|}^2=\sin ({\mathrm{\θ}}_0+\frac{\mathrm{\π}}{{4\mathrm{\λ}}_0}{\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i)---\left(2\right)$

In like manner, along θ ₀direction polarization feedback light back through time, feedback light is expressed as through electric field

$E_{\mathrm{iso}}=P_{\mathrm{in}}\left[{\mathrm{\Π}}_1^{i=m}M\left({\mathrm{\λ}}_i\right)\right]P_{\mathrm{out}}{E}_{\mathrm{Ref}}---\left(3\right)$

Wherein $E_{\mathrm{ref}}=\left[\begin{array}{c}\sin {\mathrm{\θ}}_0\\ \cos {\mathrm{\θ}}_0\end{array}\right]$ E ₀for polarization direction is θ ₀feedback light electric field

Can be derived as from above formula back through rate R:

$R{|E_{\mathrm{iso}}/E_{\mathrm{ref}}|}^2=\sin ({\mathrm{\θ}}_0-\frac{\mathrm{\π}}{{4\mathrm{\λ}}_0}{\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i)---\left(4\right)$

By desirable isolator condition R=0 and T=1, draw

θ ₀＝45°， ${\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i={\mathrm{N\λ}}_0---\left(5\right)$

N is odd number, from formula 5, by short wavelength's Faraday body 32 of 4 470nm, can realize the long wavelength light insulator functionality of 1879nm.

As shown in Figure 7, the present embodiment also provides a kind of optoisolator adopting above-mentioned principle, comprise external package pipe 1 and magnet ring 2, magnet ring 2 is socketed in external package pipe 1, be bonded with isolating chip in magnet ring 2, isolating chip is bonded by optical adhesive 34 and is made up of the incident polarizer 31 overlayed together, Faraday body 32 and outgoing polarization sheet 33.

Wherein, the quantity of Faraday body 32 is 4, and 4 Faraday bodies 32 are respectively the Faraday body 32 that wavelength is 470nm.

Wherein, the xsect of incident polarizer 31, Faraday body 32 and outgoing polarization sheet 33 is square.

The present embodiment realizes the isolator demand of 1879nm height wavelength by three 470nm short wavelength's Faraday bodies 32, thus reduces costs the shortening cycle.

The vertical view of the present embodiment is identical with Fig. 2, therefore, in Figure of description content, does not repeat accompanying drawing.

Embodiment 6

Make a principle for long wavelength light isolator, described optoisolator comprises incident polarizer 31, m sheet Faraday body 32, outgoing polarization sheet 33 and magnet ring 2, when wavelength is λ ₀light forward when passing through:

$E_{\mathrm{out}}=P_{\mathrm{out}}\left[{\mathrm{\Π}}_m^{i=1}M\left({\mathrm{\λ}}_i\right)\right]P_{\mathrm{in}}{E}_{\mathrm{in}}---\left(1\right)$

Wherein

$E_{\mathrm{in}}=\left[\begin{array}{c}{E}_0\\ 0\end{array}\right]$ For the incident light electric field of horizontal polarization

$P_{\mathrm{in}}\left(0\right)=\left[\begin{array}{cc}1& 0\\ 0& 0\end{array}\right]$ For the incident polarizer 31 of horizontal positioned

$M\left({\mathrm{\λ}}_i\right)=\left[\begin{array}{cc}\cos (\mathrm{\π}{\mathrm{\λ}}_i/{4\mathrm{\λ}}_0)& -\sin ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)\\ \sin ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)& \cos ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)\end{array}\right]$ For short wavelength λ _i45 degree of faraday rotators

$P_{\mathrm{out}}=\left[\begin{array}{cc}{\sin }^2{\mathrm{\θ}}_0& \sin {\mathrm{\θ}}_0\cos {\mathrm{\θ}}_0\\ \sin {\mathrm{\θ}}_0\cos {\mathrm{\θ}}_0& {\cos }^2{\mathrm{\θ}}_0\end{array}\right]$ For θ ₀the outgoing polarization sheet 33 that angle is placed

Bring into above various, and notice

${\mathrm{\Π}}_m^{i=1}M\left({\mathrm{\λ}}_i\right)=M\left({\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i\right)$

The forward transmitance T of isolator is

$T={|E_{\mathrm{out}}/E_{\mathrm{in}}|}^2=\sin ({\mathrm{\θ}}_0+\frac{\mathrm{\π}}{{4\mathrm{\λ}}_0}{\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i)---\left(2\right)$

In like manner, along θ ₀direction polarization feedback light back through time, feedback light is expressed as through electric field

$E_{\mathrm{iso}}=P_{\mathrm{in}}\left[{\mathrm{\Π}}_1^{i=m}M\left({\mathrm{\λ}}_i\right)\right]P_{\mathrm{out}}{E}_{\mathrm{Ref}}---\left(3\right)$

Wherein $E_{\mathrm{ref}}=\left[\begin{array}{c}\sin {\mathrm{\θ}}_0\\ \cos {\mathrm{\θ}}_0\end{array}\right]$ E ₀for polarization direction is θ ₀feedback light electric field

Can be derived as from above formula back through rate R:

$R{|E_{\mathrm{iso}}/E_{\mathrm{ref}}|}^2=\sin ({\mathrm{\θ}}_0-\frac{\mathrm{\π}}{{4\mathrm{\λ}}_0}{\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i)---\left(4\right)$

By desirable isolator condition R=0 and T=1, draw

θ ₀＝45°， ${\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i={\mathrm{N\λ}}_0---\left(5\right)$

N is odd number, from formula 5, by short wavelength's Faraday body 32 of three 599nm, can realize the long wavelength light insulator functionality of 1795nm.

As shown in Figure 8, the present embodiment also provides a kind of optoisolator adopting above-mentioned principle, comprise external package pipe 1 and magnet ring 2, magnet ring 2 is socketed in external package pipe 1, be bonded with isolating chip in magnet ring 2, isolating chip is bonded by optical adhesive 34 and is made up of the incident polarizer 31 overlayed together, Faraday body 32 and outgoing polarization sheet 33.

Wherein, the quantity of Faraday body 32 is 4, and 4 Faraday bodies 32 are respectively the Faraday body 32 that wavelength is 500nm.

Wherein, the xsect of incident polarizer 31, Faraday body 32 and outgoing polarization sheet 33 is square.

Further, magnet ring 2 is provided with steel loop 4 with the joint portion of isolating chip, steel loop 4 and seamless between magnet ring 2 and isolating chip, steel loop 4 internal diameter and the effective light hole of long wavelength's isolator measure-alike.Between magnet ring and chip, install stainless steel ring 4 additional, cover gap, avoid gap light leak and the drawback filling up glue inefficiency, unstable properties.

The present embodiment realizes the isolator demand of 2000nm height wavelength by 4 500nm short wavelength's Faraday bodies 32, thus reduces costs the shortening cycle.

The stereographic map of the present embodiment is identical with Fig. 4, therefore, in Figure of description content, does not repeat accompanying drawing.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. make a principle for long wavelength light isolator, it is characterized in that: described optoisolator comprises incident polarizer, m sheet Faraday body, outgoing polarization sheet and magnet ring, when wavelength is λ ₀light forward when passing through:

$E_{\mathrm{out}}=P_{\mathrm{out}}\left[{\mathrm{\Π}}_m^{i=1}M\left({\mathrm{\λ}}_i\right)\right]P_{\mathrm{in}}{E}_{\mathrm{in}}---\left(1\right)$

Wherein

$E_{\mathrm{in}}=\left[\begin{array}{c}{E}_0\\ 0\end{array}\right]$ For the incident light electric field of horizontal polarization

$P_{\mathrm{in}}\left(0\right)=\left[\begin{array}{cc}1& 0\\ 0& 0\end{array}\right]$ For the incident polarizer of horizontal positioned

$M\left({\mathrm{\λ}}_i\right)=\left[\begin{array}{cc}\cos (\mathrm{\π}{\mathrm{\λ}}_i/{4\mathrm{\λ}}_0)& -\sin ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)\\ \sin ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)& \cos ({\mathrm{\π\λ}}_i/{4\mathrm{\λ}}_0)\end{array}\right]$ For short wavelength λ _i45 degree of faraday rotators

$P_{\mathrm{out}}=\left[\begin{array}{cc}{\sin }^2{\mathrm{\θ}}_0& \sin {\mathrm{\θ}}_0\cos {\mathrm{\θ}}_0\\ \sin {\mathrm{\θ}}_0\cos {\mathrm{\θ}}_0& {\cos }^2{\mathrm{\θ}}_0\end{array}\right]$ For θ ₀the outgoing polarization sheet that angle is placed

Bring into above various, and notice

${\mathrm{\Π}}_m^{i=1}M\left({\mathrm{\λ}}_i\right)=M\left({\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i\right)$

The forward transmitance T of isolator is

$T={|E_{\mathrm{out}}/E_{\mathrm{in}}|}^2=\sin ({\mathrm{\θ}}_0+\frac{\mathrm{\π}}{{4\mathrm{\λ}}_0}{\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i)---\left(2\right)$

In like manner, along θ ₀direction polarization feedback light back through time, feedback light is expressed as through electric field

$E_{\mathrm{iso}}=P_{\mathrm{in}}\left[{\mathrm{\Π}}_1^{i=m}M\left({\mathrm{\λ}}_i\right)\right]P_{\mathrm{out}}{E}_{\mathrm{Ref}}---\left(3\right)$

Wherein $E_{\mathrm{ref}}=\left[\begin{array}{c}\sin {\mathrm{\θ}}_0\\ \cos {\mathrm{\θ}}_0\end{array}\right]$ E ₀for polarization direction is θ ₀feedback light electric field

Can be derived as from above formula back through rate R:

$R{|E_{\mathrm{iso}}/E_{\mathrm{ref}}|}^2=\sin ({\mathrm{\θ}}_0-\frac{\mathrm{\π}}{{4\mathrm{\λ}}_0}{\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i)---\left(4\right)$

By desirable isolator condition R=0 and T=1, draw

θ ₀＝45°， ${\mathrm{\Σ}}_m^{i=1}{\mathrm{\λ}}_i={\mathrm{N\λ}}_0---\left(5\right)$

N is odd number, from formula 5, by multi-disc short wavelength Faraday body, can realize long wavelength light insulator functionality.

2. one kind adopts the optoisolator of principle described in claim 1, comprise external package pipe and magnet ring, described magnet ring is socketed in described external package pipe, isolating chip is bonded with in described magnet ring, it is characterized in that: described isolating chip is made up of the incident polarizer overlayed together, Faraday body and outgoing polarization sheet optical adhesive bonding, and the quantity of described Faraday body is at least two.

3. optoisolator according to claim 2, is characterized in that: the quantity of described Faraday body is two, and two Faraday bodies are respectively the Faraday body that wavelength is 825nm.

4. optoisolator according to claim 2, is characterized in that: the quantity of described Faraday body is two, and two Faraday bodies are respectively the Faraday body that wavelength is 862.5nm.

5. optoisolator according to claim 2, is characterized in that: the quantity of described Faraday body is three, and three Faraday bodies are respectively the Faraday body that wavelength is 599nm.

6. optoisolator according to claim 2, is characterized in that: the quantity of described Faraday body is three, and three Faraday bodies are respectively the Faraday body that wavelength is 581nm.

7. optoisolator according to claim 2, is characterized in that: the quantity of described Faraday body is four, and four Faraday bodies are respectively the Faraday body that wavelength is 470nm.

8. optoisolator according to claim 2, is characterized in that: the quantity of described Faraday body is four, and four Faraday bodies are respectively the Faraday body that wavelength is 500nm.

9. according to any one of claim 3 ~ 8 optoisolator, it is characterized in that: the xsect of described incident polarizer, described Faraday body and outgoing polarization sheet is square.

10. optoisolator according to claim 2, is characterized in that: the joint portion of described magnet ring and described isolating chip is provided with steel loop, described steel loop and seamless between described magnet ring and described isolating chip.