CN201846339U - Delay line interferometer based on polarized light - Google Patents
Delay line interferometer based on polarized light Download PDFInfo
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- CN201846339U CN201846339U CN 201020599890 CN201020599890U CN201846339U CN 201846339 U CN201846339 U CN 201846339U CN 201020599890 CN201020599890 CN 201020599890 CN 201020599890 U CN201020599890 U CN 201020599890U CN 201846339 U CN201846339 U CN 201846339U
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Abstract
The utility model relates to a delay line interferometer based on polarized light. The delay line interferometer based on polarized light comprises a delay line interference device and a polarized light generating component arranged at the front end of the delay line interference device, wherein the polarized light generating component comprise a first beam moving device (1.1), a first half-wave plate (1.2) and a first quarter wave plate (1.3); the first half-wave plate (1.2) is arranged on one side of the light-emitting surface of the first beam moving device (1.1); and the first quarter wave plate (1.3) is arranged on one side of the light-emitting surface of the first half-wave plate (1.2). The delay line interferometer based on polarized light has the benefits of extremely low polarization dependent loss and frequency shift, and high extinction ratio.
Description
Technical field
The utility model relates to a kind of delay line interferometer, especially relates to a kind of delay line interferometer based on polarised light.
Background technology
At present, in speed fiber optic communication systems, difference keying (DPSK) modulator approach that matches can effectively reduce the error rate of being brought by chromatic dispersion in the system and nonlinear effect.For dpsk signal is carried out demodulation, the demodulator based on delay line interferometer is placed in before the optical receiver usually.
Delay line interferometer can be made of michelson interferometer as shown in Figure 6, also can be made of Mach-Zehnder interferometer as shown in Figure 7; Most of fibre delay line interferometer comprises that all a beam splitter is assigned to two with light and interferes in the arms, again by a bundling device together photosynthetic with in two arms.Bundling device can be as the same beam splitter in the michelson interferometer, also can be as second beam splitter in the Mach-Zehnder interferometer.When having optical path difference between two arms of interferometer, the output spectrum of this class interferometer is sinusoid and distributes, and under suitable condition, the maximum of output can match with the ITU communication frequency, so this class interferometer method often is used in the spectral separator.
Owing to have optical path difference between two arms, it is poor that signal also can generation time during through the light arm, and when the time difference equated with the one-period of modulation signal, this interferometer just can be used for the DPSK demodulator.There is several method to be used to realize this class demodulator at present, comprises the free space michelson interferometer, free space polarizing interferometer and waveguide type Mach-Zehnder interferometer.
U.S. Patent application file 2007/0070505 has been described a kind of demodulator based on unpolarized beam splitter.U.S. Patent application file 2006/0140695A1 utilizes michelson interferometer to realize four differential ference spiral devices.Chinese patent file 200820145114.5 has been described a kind of DPSK demodulator based on little incidence angle beam splitter.Chinese patent file 200810071584.6 has provided a kind of four differential ference spiral devices based on two cover delay line interferometer.In these unpolarized interferometers, the beam splitter that splitting ratio is 50:50 is a Primary Component, and its performance is directly connected to the size of demodulator Polarization Dependent Loss and the relevant frequency displacement of polarization.
Yet all unpolarized methods all need have extremely low birefringence effect in interfering arm, otherwise will cause the relevant frequency displacement with high polarization of high Polarization Dependent Loss.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of delay line interferometer based on polarised light with extremely low Polarization Dependent Loss, frequency displacement and High Extinction Ratio is provided.
The purpose of this utility model is achieved in that a kind of delay line interferometer based on polarised light, described delay line interferometer based on polarised light is by the delay line interference device and place the polarised light generating assembly of delay line interference device front end to constitute, described polarised light generating assembly includes first and moves bundle device, first half-wave plate and first quarter-wave plate, described first half-wave plate places first exiting surface one side of moving the bundle device, and described first quarter-wave plate places exiting surface one side of first half-wave plate.
The utility model is a kind of delay line interferometer based on polarised light, described delay line interference device includes second and moves the bundle device, second half-wave plate, the polarization spectro sheet, reflector plate, second quarter-wave plate, speculum one, speculum two, the 3rd half-wave plate, the 3rd moves the bundle device, prism one, the 3rd quarter-wave plate, the 4th moves the bundle device, the 4th half-wave plate, the 5th half-wave plate and the 5th moves the bundle device, described second moves exiting surface one side that the bundle device is positioned at first quarter-wave plate, described second half-wave plate is positioned at second exiting surface one side of moving the bundle device, and described second half-wave plate only covers one road polarised light, oblique second exiting surface one side of moving the bundle device and second half-wave plate that is arranged at of described polarization spectro sheet, described reflector plate is positioned at polarization spectro sheet below, and described reflector plate parallels setting with the polarization spectro sheet, described second quarter-wave plate is positioned at exiting surface one side of polarization spectro sheet, described speculum one and speculum two are positioned at exiting surface one side of second quarter-wave plate, described speculum one and speculum two correspond respectively to one road polarised light, described the 3rd half-wave plate is positioned at exiting surface one side of reflector plate, and described the 3rd half-wave plate only covers one road polarised light, the described the 3rd moves exiting surface one side that the bundle device is positioned at reflector plate and the 3rd half-wave plate, described prism is proper one by one to move the bundle device to the 3rd, the other end is over against the 3rd quarter-wave plate, the described the 4th moves exiting surface one side that the bundle device is positioned at the 3rd quarter-wave plate, described the 4th half-wave plate and the 5th half-wave plate are positioned at the 4th exiting surface one side of moving the bundle device, and described the 4th half-wave plate and the 5th half-wave plate be corresponding one road light respectively, and the described the 5th moves exiting surface one side that the bundle device is positioned at the 4th half-wave plate and the 5th half-wave plate.
The utility model is a kind of delay line interferometer based on polarised light, described delay line interference device includes the 6th and moves the bundle device, phase-shifter one, the 7th moves the bundle device, the 4th quarter-wave plate, the 8th moves the bundle device, the 6th half-wave plate, the 7th half-wave plate and the 9th moves the bundle device, the described the 6th moves exiting surface one side that the bundle device is positioned at first quarter-wave plate, the described the 7th moves the bundle device is positioned at the 6th exiting surface one side of moving the bundle device, described phase-shifter one be inserted in the 6th move the bundle device and the 7th move the bundle device between, and described phase-shifter one covers one road polarised light, described the 4th quarter-wave plate is positioned at the 7th exiting surface one side of moving the bundle device, the described the 8th moves exiting surface one side that the bundle device is positioned at the 4th quarter-wave plate, the described the 9th moves the bundle device is positioned at the 8th exiting surface one side of moving the bundle device, described the 6th half-wave plate and the 7th half-wave plate move bundle device and the 9th the 8th and move between the bundle device, and described the 6th half-wave plate and corresponding one road light of the 7th half-wave plate difference.
The utility model is a kind of delay line interferometer based on polarised light, and described delay line interference device includes the polarization spectro sheet
, reflector plate
, the 5th quarter-wave plate, phase-shifter two, speculum the three, the 6th quarter-wave plate, prism the two, the tenth move bundle device, the 8th half-wave plate, the 9th half-wave plate and the 11 and move the bundle device, described polarization spectro sheet
Oblique exiting surface one side that is arranged at first quarter-wave plate, described reflector plate
Be positioned at the polarization spectro sheet
Top, and described reflector plate
With the polarization spectro sheet
Parallel setting, described the 5th quarter-wave plate places the polarization spectro sheet
And reflector plate
Exiting surface one side, described speculum three is positioned at exiting surface one side of the 5th quarter-wave plate, described phase-shifter two is inserted between the 5th quarter-wave plate and speculum three, and two coverings of described phase-shifter, one road polarised light, and described the 6th quarter-wave plate places the polarization spectro sheet
The below exiting surface go out, described prism two is positioned at exiting surface one side of the 6th quarter-wave plate, and the opposite side exiting surface of described prism two moves the bundle device over against the tenth, the described the 11 moves the bundle device is positioned at the tenth exiting surface one side of moving the bundle device, described the 8th half-wave plate and the 9th half-wave plate be inserted in the tenth move the bundle device and the 11 move the bundle device between, and described the 8th half-wave plate and the 9th half-wave plate be corresponding one road light respectively, and the described the 11 exiting surface that moves the bundle device is derived two-way light.
The utility model is a kind of delay line interferometer based on polarised light, and described delay line interference device includes the polarization spectro sheet
, the polarization spectro sheet
, the 7th quarter-wave plate, polarization spectro sheet
, reflector plate
, phase-shifter three, speculum four, speculum the five, the tenth half-wave plate, the 12 move the bundle device, the tenth half of wave plate, the 13 is moved bundle device and Faraday rotator, described polarization spectro sheet
Oblique exiting surface one side that is arranged at first quarter-wave plate, described speculum five and polarization spectro sheet
Be arranged at the polarization spectro sheet respectively
The above and below, described polarization spectro sheet
, the polarization spectro sheet
Be parallel to each other with speculum five, the described the 13 moves exiting surface one side that the bundle device is positioned at speculum five, and described the tenth half of wave plate is inserted in speculum the five and the 13 and moves between the bundle device, and described Faraday rotator is inserted in the polarization spectro sheet
With the polarization spectro sheet
Between, described the tenth half-wave plate and the 7th quarter-wave plate lay respectively at the polarization spectro sheet
The left and right sides, the described the 12 moves the bundle device is arranged at exiting surface one side of the tenth half-wave plate, described polarization spectro sheet
Oblique exiting surface one side that is arranged at the 7th quarter-wave plate, described speculum four is positioned at the polarization spectro sheet
The right side, described phase-shifter three is inserted in the polarization spectro sheet
And between the speculum four, and three of described phase-shifters cover one road light, described reflector plate
Be arranged at the polarization spectro sheet
Top, and described reflector plate
With the polarization spectro sheet
Parallel setting.
Operation principle of the present utility model is:
During work, the non-polarized light of input is divided into two bunch polarised lights after moving the bundle device via first on Z-direction (Z-direction for perpendicular to the paper plane direction), a branch of behind first half-wave plate in the two bunch polarised lights then, and the polarization direction is rotated by 90 degrees; This two bundles polarised light enters the delay line interference device behind first quarter-wave plate subsequently.
The beneficial effects of the utility model are:
Owing to be provided with the polarised light generating assembly at front end, two polarized components in the incident light are converted into same direction, thereby make a whole set of interferometer have extremely low Polarization Dependent Loss, frequency displacement and High Extinction Ratio.
Description of drawings
Fig. 1 is the utility model polarised light generating assembly.
Fig. 2 is the utility model embodiment one structural representation.
Fig. 3 is the utility model embodiment two structural representations.
Fig. 4 is the utility model embodiment three structural representations.
Fig. 5 is the utility model embodiment four structural representations.
Fig. 6 is the michelson interferometer structural representation.
Fig. 7 is Mach-increase Dare interferometer structure schematic diagram.
Among the figure:
First moves bundle device 1.1, first half-wave plate 1.2, first quarter-wave plate 1.3;
Second moves bundle device 2.1, second half-wave plate 2.2, polarization spectro sheet 2.3, reflector plate 2.4, second quarter-wave plate 2.5, speculum 1, speculum 2 2.7, the 3rd half-wave plate the 2.8, the 3rd moves bundle device 2.9, prism 1, the 3rd quarter-wave plate the 2.11, the 4th and moves bundle device 2.12, the 4th half-wave plate 2.13, the 5th half-wave plate the 2.14, the 5th and move bundle device 2.15;
The 6th moves bundle device 3.1, phase-shifter the one 3.2, the 7th moves bundle device 3.3, the 4th quarter-wave plate the 3.4, the 8th and moves bundle device 3.5, the 6th half-wave plate 3.6, the 7th half-wave plate the 3.7, the 9th and move bundle device 3.8;
The polarization spectro sheet
4.1, reflector plate
4.2, the 5th quarter-wave plate 4.3, phase-shifter 2 4.4, speculum 3 4.5, the 6th quarter-wave plate 4.6, prism the 2 4.7, the tenth move bundle device 4.8, the 8th half-wave plate 4.9, the 9th half-wave plate the 4.10, the 11 and move bundle device 4.11;
The polarization spectro sheet
5.1, the polarization spectro sheet
5.2, the 7th quarter-wave plate 5.3, polarization spectro sheet
5.4, reflector plate
5.5, phase-shifter 3 5.6, speculum 4 5.7, speculum 5 5.8, the tenth half-wave plate the 5.9, the 12 move bundle device 5.10, the tenth half of wave plate the 5.11, the 13 is moved bundle device 5.12, Faraday rotator 5.13.
Embodiment
Below in conjunction with embodiment the utility model is done and to be specified.
Embodiment one:
Referring to Fig. 2, the utility model relates to a kind of delay line interferometer based on polarised light, described delay line interferometer based on polarised light is by the delay line interference device and place the polarised light generating assembly of delay line interference device front end to constitute, described polarised light generating assembly includes first and moves bundle device 1.1, first half-wave plate 1.2 and first quarter-wave plate 1.3, described first half-wave plate 1.2 places first exiting surface one side of moving bundle device 1.1, and 1.2 of described first half-wave plates cover one road polarised light, and described first quarter-wave plate 1.3 places exiting surface one side of first half-wave plate 1.2;
In the present embodiment delay line interference device include second move the bundle device 2.1, second half-wave plate 2.2, polarization spectro sheet 2.3, reflector plate 2.4, second quarter-wave plate 2.5, speculum 1, speculum 2 2.7, the 3rd half-wave plate 2.8, the 3rd moves bundle device 2.9, prism 1, the 3rd quarter-wave plate 2.11, the 4th moves bundle device 2.12, the 4th half-wave plate 2.13, the 5th half-wave plate 2.14 and the 5th moves bundle device 2.15, described second moves exiting surface one side that bundle device 2.1 is positioned at first quarter-wave plate 1.3, described second half-wave plate 2.2 is positioned at second exiting surface one side of moving bundle device 2.1, and 2.2 of described second half-wave plates cover one road polarised light, described polarization spectro sheet 2.3 oblique second exiting surface one sides of moving the bundle device 2.1 and second half-wave plate 2.2 that are arranged at, described reflector plate 2.4 is positioned at polarization spectro sheet 2.3 belows, and described reflector plate 2.4 parallels setting with polarization spectro sheet 2.3, described second quarter-wave plate 2.5 is positioned at exiting surface one side of polarization spectro sheet 2.3, described speculum 1 and speculum 2 2.7 are positioned at exiting surface one side of second quarter-wave plate 2.5, described speculum 1 and speculum 2 2.7 correspond respectively to one road polarised light, described the 3rd half-wave plate 2.8 is positioned at exiting surface one side of reflector plate 2.4, and 2.8 of described the 3rd half-wave plates cover one road polarised light, the described the 3rd moves exiting surface one side that bundle device 2.9 is positioned at reflector plate 2.4 and the 3rd half-wave plate 2.8, described prism one 2.10 one proper moving the 3rd are restrainted device 2.9, the other end is over against the 3rd quarter-wave plate 2.11, the described the 4th moves exiting surface one side that bundle device 2.12 is positioned at the 3rd quarter-wave plate 2.11, described the 4th half-wave plate 2.13 and the 5th half-wave plate 2.14 are positioned at the 4th exiting surface one side of moving bundle device 2.12, and described the 4th half-wave plate 2.13 and the 5th half-wave plate 2.14 be corresponding one road light respectively, the described the 5th moves exiting surface one side that bundle device 2.15 is positioned at the 4th half-wave plate 2.13 and the 5th half-wave plate 2.14, and the described the 5th exiting surface that moves bundle device 2.15 is derived the output of two-way light.
During work, the two bunch polarised lights that produce by the polarised light generating assembly enter second move bundle device 2.1 after, being moved bundle device 2.1 by second once more further is assigned in two interference arms in X-direction (X-direction is a vertical direction on the paper plane), here second effect that moves bundle device 2.1 is equivalent to a beam splitter, and the effect of second half-wave plate 2.2 is to make polarisation of light direction unanimity in two arms.Spatially keep the speculum 1 of certain intervals and speculum 2 2.7 respectively the light in two arms to be reflexed to the 3rd and move the phase difference of bundle device 2.9, two arms by the distance decision between speculum 1 and the speculum 2 2.7; The effect of second quarter-wave plate 2.5 is to turn 90 degrees revolving in its rear polarizer direction of twice process of light, and the 3rd effect that moves bundle device 2.9 is that the light in two arms is merged together; The light that is merged together is producing interference through the 3rd quarter-wave plate 2.11 backs, and move bundle via the 4th and be assigned to two outputs behind the device 2.12, the effect that the 4th half-wave plate 2.13, the 5th half-wave plate 2.14 and the 5th move bundle device 2.15 is in the Z direction two bundle polarised lights to be reconsolidated to be in the same place.
Embodiment two:
Referring to Fig. 3, described embodiment two is with the difference of embodiment one: described delay line interference device adopts not isostructure, described delay line interference device includes the 6th and moves bundle device 3.1, phase-shifter 1, the 7th moves bundle device 3.3, the 4th quarter-wave plate 3.4, the 8th moves bundle device 3.5, the 6th half-wave plate 3.6, the 7th half-wave plate 3.7 and the 9th moves bundle device 3.8, the described the 6th moves exiting surface one side that bundle device 3.1 is positioned at first quarter-wave plate 1.3, the described the 7th moves bundle device 3.3 is positioned at the 6th exiting surface one side of moving bundle device 3.1, described phase-shifter 1 be inserted in the 6th move the bundle device 3.1 and the 7th move the bundle device 3.3 between, and described phase-shifter 1 covers one road polarised light, described the 4th quarter-wave plate 3.4 is positioned at the 7th exiting surface one side of moving bundle device 3.3, the described the 8th moves exiting surface one side that bundle device 3.5 is positioned at the 4th quarter-wave plate 3.4, the described the 9th moves bundle device 3.8 is positioned at the 8th exiting surface one side of moving bundle device 3.5, described the 6th half-wave plate 3.6 and the 7th half-wave plate 3.7 move bundle device 3.5 and the 9th the 8th and move between the bundle device 3.8, and described the 6th half-wave plate 3.6 and the 7th half-wave plate 3.7 be corresponding one road light respectively, and the described the 9th exiting surface that moves bundle device 3.8 is derived the output of two-way light.
During work, the two bunch polarised lights that produce by the polarised light generating assembly enter the 6th move bundle device 3.1 after, two-beam further is separated into two in X-direction interferes in the arm, here the 6th move the effect that bundle device 3.1 plays beam splitter, the phase-shifter 1 that is arranged in an arm is used for controlling the optical path difference of two arms, thereby reach the purpose of tuning output light frequency, the 7th effect that moves bundle device 3.3 is a combined light beam, the 4th quarter-wave plate 3.4 and the 8th moves bundle device 3.5 and combines and be assigned to two outputs once more with merging later light, again by the 6th half-wave plate 3.6, the 7th half-wave plate 3.7 and the 9th moves bundle device 3.8 and will combine at the linearly polarized light that Z-direction is separated, and recovers the non-polarized light state.
Embodiment three:
Referring to Fig. 4, described embodiment three is with the difference of embodiment one: described delay line interference device adopts not isostructure, and described delay line interference device includes the polarization spectro sheet
4.1, reflector plate
4.2, the 5th quarter-wave plate 4.3, phase-shifter 2 4.4, speculum 3 4.5, the 6th quarter-wave plate 4.6, prism the 2 4.7, the tenth move bundle device 4.8, the 8th half-wave plate 4.9, the 9th half-wave plate the 4.10 and the 11 and move bundle device 4.11, described polarization spectro sheet
4.1 oblique exiting surface one side that is arranged at first quarter-wave plate 1.3, described reflector plate
4.2 be positioned at the polarization spectro sheet
4.1 top, and described reflector plate
4.2 with the polarization spectro sheet
4.1 parallel setting, described the 5th quarter-wave plate 4.3 places the polarization spectro sheet
4.1 and reflector plate
4.2 exiting surface one side, described speculum 3 4.5 is positioned at exiting surface one side of the 5th quarter-wave plate 4.3, described phase-shifter 2 4.4 is inserted between the 5th quarter-wave plate 4.3 and speculum 3 4.5, and 2 4.4 of described phase-shifters cover one road polarised light, and described the 6th quarter-wave plate 4.6 places the polarization spectro sheet
4.1 the below exiting surface go out, described prism 2 4.7 is positioned at exiting surface one side of the 6th quarter-wave plate 4.6, and the opposite side exiting surface of described prism 2 4.7 moves bundle device 4.8 over against the tenth, the described the 11 moves bundle device 4.11 is positioned at the tenth exiting surface one side of moving bundle device 4.8, described the 8th half-wave plate 4.9 and the 9th half-wave plate 4.10 be inserted in the tenth move the bundle device the 4.8 and the 11 move the bundle device 4.11 between, and described the 8th half-wave plate 4.9 and the 9th half-wave plate 4.10 be corresponding one road light respectively, and the described the 11 exiting surface that moves bundle device 4.11 is derived two-way light.
During work, the two bunch polarised lights that produced by the polarised light generating assembly enter by the polarization spectro sheet
4.1 and reflector plate
4.2 the polarization beam apparatus that constitutes, two-beam further is divided into two-beam by above-mentioned polarization beam apparatus again respectively in paper plane, the 5th quarter-wave plate 4.3 between polarization beam apparatus and speculum 3 4.5 revolves its rear polarizer direction of twice process of light and turn 90 degrees, and the optical path difference between two arms depends on the polarization spectro sheet
4.1 and reflector plate
4.2 between spacing, by the polarization spectro sheet
4.1 and reflector plate
4.2 the polarization beam apparatus that constitutes and the optical thickness of interval between the speculum 3 4.5 and phase-shifter 2 4.4; Four bundle light by speculum 3 4.5 reflected backs pass through once more by the polarization spectro sheet
4.1 and reflector plate
4.2 be merged into behind the two-beam behind the polarization beam apparatus that constitutes and lead and the tenth move bundle device 4.8, because the existence of the 6th quarter-wave plate 4.6, light from two arms produces interference, and via the tenth move the bundle device 4.8 be assigned to two outputs, the 8th half-wave plate 4.9, the 9th half-wave plate the 4.10, the 11 move the bundle device 4.11 effect be that the two bunch polarised lights that will separate in the Z direction reconsolidate together.
Embodiment four:
Referring to Fig. 5, described embodiment four is with the difference of embodiment one: described delay line interference device adopts not isostructure, and described delay line interference device includes the polarization spectro sheet
5.1, the polarization spectro sheet
5.2, the 7th quarter-wave plate 5.3, polarization spectro sheet
5.4, reflector plate
5.5, phase-shifter 3 5.6, speculum 4 5.7, speculum 5 5.8, the tenth half-wave plate the 5.9, the 12 move bundle device 5.10, the tenth half of wave plate the 5.11, the 13 is moved bundle device 5.12 and Faraday rotator 5.13, described polarization spectro sheet
5.1 oblique exiting surface one side that is arranged at first quarter-wave plate 1.3, described speculum 5 5.8 and polarization spectro sheet
5.2 be arranged at the polarization spectro sheet respectively
5.1 the above and below, described polarization spectro sheet
5.1, the polarization spectro sheet
5.2 and speculum 5 5.8 is parallel to each other, the described the 13 moves exiting surface one side that bundle device 5.12 is positioned at speculum 5 5.8, described the tenth half of wave plate 5.11 is inserted in speculum the 5 5.8 and the 13 and moves between the bundle device 5.12, and described Faraday rotator 5.13 is inserted in the polarization spectro sheet
5.1 and polarization spectro sheet
5.2 between, described the tenth half-wave plate 5.9 and the 7th quarter-wave plate 5.3 lay respectively at the polarization spectro sheet
5.2 the left and right sides, the described the 12 moves bundle device 5.10 is arranged at exiting surface one side of the tenth half-wave plate 5.9, described polarization spectro sheet
5.4 oblique exiting surface one side that is arranged at the 7th quarter-wave plate 5.3, described speculum 4 5.7 is positioned at the polarization spectro sheet
5.4 the right side, described phase-shifter 3 5.6 is inserted in the polarization spectro sheet
5.4 and between the speculum 4 5.7, and 3 5.6 of described phase-shifters cover one road light, described reflector plate
5.5 be arranged at the polarization spectro sheet
5.4 top, and described reflector plate
5.5 with the polarization spectro sheet
5.4 parallel setting.
During work, the two bunch polarised lights that produced by the polarised light generating assembly are polarized light splitting piece successively
5.1, the polarization spectro sheet
5.2 after this reflection changes circularly polarized light through the 7th quarter-wave plate 5.3 into by linearly polarized light again, two interfere the optical path difference of arms to depend on the polarization spectro sheet
5.4 with reflector plate
5.5 interval, reflector plate
5.5 with the interval of speculum 4 5.7 and the optical thickness of phase-shifter 3 5.6.At work, the totally four bundle light by speculum 4 5.7 returns pass through the polarization spectro sheet once more
5.4 and reflector plate
5.5 after be merged into two bundles, and produce through the 7th quarter-wave plate 5.3 back once more and interfere, again by the polarization spectro sheet
5.2 be assigned to two outputs, the light of same wavelength is assigned to the ratio of two outputs and interferes the phasic difference decision of arm by two.Move bundle device the 5.10 and the 13 by the 12 and move bundle device 5.12, the two bunch polarised lights that separate on Z-direction are reconsolidated together.The effect of stating Faraday rotator 5.13 be for will be with the same polarization direction of incident light the opposite output photoconduction output upward in the direction of propagation, thereby avoid returning the input of below.
Above-mentioned described phase-shifter all adopts the transmission-type phase-shifter, and the above-mentioned bundle device that moves all adopts YVO
4Move the bundle device, described YVO
4The expression yttrium vanadate crystal.
Those skilled in the art can adopt conventional interferometer to substitute above-mentioned delay line interference device, all belong within the utility model protection range.
Claims (5)
1. delay line interferometer based on polarised light, it is characterized in that: described delay line interferometer based on polarised light is by the delay line interference device and place the polarised light generating assembly of delay line interference device front end to constitute, described polarised light generating assembly includes first and moves bundle device (1.1), first half-wave plate (1.2) and first quarter-wave plate (1.3), described first half-wave plate (1.2) places first exiting surface one side of moving bundle device (1.1), and described first quarter-wave plate (1.3) places exiting surface one side of first half-wave plate (1.2).
2. a kind of according to claim 1 delay line interferometer based on polarised light, it is characterized in that: described delay line interference device includes second and moves bundle device (2.1), second half-wave plate (2.2), polarization spectro sheet (2.3), reflector plate (2.4), second quarter-wave plate (2.5), speculum one (2.6), speculum two (2.7), the 3rd half-wave plate (2.8), the 3rd moves bundle device (2.9), prism one (2.10), the 3rd quarter-wave plate (2.11), the 4th moves bundle device (2.12), the 4th half-wave plate (2.13), the 5th half-wave plate (2.14) and the 5th moves bundle device (2.15), described second moves exiting surface one side that bundle device (2.1) is positioned at first quarter-wave plate (1.3), described second half-wave plate (2.2) is positioned at second exiting surface one side of moving bundle device (2.1), and described second half-wave plate (2.2) only covers one road polarised light, oblique second exiting surface one side of moving bundle device (2.1) and second half-wave plate (2.2) that is arranged at of described polarization spectro sheet (2.3), described reflector plate (2.4) is positioned at polarization spectro sheet (2.3) below, and described reflector plate (2.4) parallels setting with polarization spectro sheet (2.3), described second quarter-wave plate (2.5) is positioned at exiting surface one side of polarization spectro sheet (2.3), described speculum one (2.6) and speculum two (2.7) are positioned at exiting surface one side of second quarter-wave plate (2.5), described speculum one (2.6) and speculum two (2.7) correspond respectively to one road polarised light, described the 3rd half-wave plate (2.8) is positioned at exiting surface one side of reflector plate (2.4), and described the 3rd half-wave plate (2.8) only covers one road polarised light, the described the 3rd moves exiting surface one side that bundle device (2.9) is positioned at reflector plate (2.4) and the 3rd half-wave plate (2.8), described prism one (2.10) one proper moving the 3rd restrainted device (2.9), the other end is over against the 3rd quarter-wave plate (2.11), the described the 4th moves exiting surface one side that bundle device (2.12) is positioned at the 3rd quarter-wave plate (2.11), described the 4th half-wave plate (2.13) and the 5th half-wave plate (2.14) are positioned at the 4th exiting surface one side of moving bundle device (2.12), and described the 4th half-wave plate (2.13) and the 5th half-wave plate (2.14) be corresponding one road light respectively, and the described the 5th moves exiting surface one side that bundle device (2.15) is positioned at the 4th half-wave plate (2.13) and the 5th half-wave plate (2.14).
3. a kind of according to claim 1 delay line interferometer based on polarised light, it is characterized in that: described delay line interference device includes the 6th and moves bundle device (3.1), phase-shifter one (3.2), the 7th moves bundle device (3.3), the 4th quarter-wave plate (3.4), the 8th moves bundle device (3.5), the 6th half-wave plate (3.6), the 7th half-wave plate (3.7) and the 9th moves bundle device (3.8), the described the 6th moves exiting surface one side that bundle device (3.1) is positioned at first quarter-wave plate (1.3), the described the 7th moves bundle device (3.3) is positioned at the 6th exiting surface one side of moving bundle device (3.1), described phase-shifter one (3.2) is inserted to and moves bundle device (3.1) and the 7th in the 6th and move and restraint between the device (3.3), and described phase-shifter one (3.2) covers one road polarised light, described the 4th quarter-wave plate (3.4) is positioned at the 7th exiting surface one side of moving bundle device (3.3), the described the 8th moves exiting surface one side that bundle device (3.5) is positioned at the 4th quarter-wave plate (3.4), the described the 9th moves bundle device (3.8) is positioned at the 8th exiting surface one side of moving bundle device (3.5), described the 6th half-wave plate (3.6) and the 7th half-wave plate (3.7) are positioned at the 8th and move bundle device (3.5) and the 9th and move between bundle device (3.8), and described the 6th half-wave plate (3.6) and the 7th half-wave plate (3.7) are distinguished corresponding one road light.
4. a kind of according to claim 1 delay line interferometer based on polarised light is characterized in that: described delay line interference device includes the polarization spectro sheet
(4.1), reflector plate
(4.2), the 5th quarter-wave plate (4.3), phase-shifter two (4.4), speculum the three (4.5), the 6th quarter-wave plate (4.6), prism the two (4.7), the tenth move bundle device (4.8), the 8th half-wave plate (4.9), the 9th half-wave plate (4.10) and the 11 and move and restraint device (4.11), described polarization spectro sheet
(4.1) oblique exiting surface one side that is arranged at first quarter-wave plate (1.3), described reflector plate
(4.2) be positioned at the polarization spectro sheet
(4.1) top, and described reflector plate
(4.2) with the polarization spectro sheet
(4.1) parallel setting, described the 5th quarter-wave plate (4.3) places the polarization spectro sheet
(4.1) and reflector plate
(4.2) exiting surface one side, described speculum three (4.5) is positioned at exiting surface one side of the 5th quarter-wave plate (4.3), described phase-shifter two (4.4) is inserted between the 5th quarter-wave plate (4.3) and speculum three (4.5), and described phase-shifter two (4.4) only covers one road polarised light, and described the 6th quarter-wave plate (4.6) places the polarization spectro sheet
(4.1) below exiting surface goes out, described prism two (4.7) is positioned at exiting surface one side of the 6th quarter-wave plate (4.6), and the opposite side exiting surface of described prism two (4.7) moves bundle device (4.8) over against the tenth, the described the 11 moves bundle device (4.11) is positioned at the tenth exiting surface one side of moving bundle device (4.8), described the 8th half-wave plate (4.9) and the 9th half-wave plate (4.10) are inserted to and move bundle device (4.8) and the 11 in the tenth and move and restraint between the device (4.11), and described the 8th half-wave plate (4.9) and the 9th half-wave plate (4.10) be corresponding one road light respectively, and the described the 11 exiting surface that moves bundle device (4.11) is derived two-way light.
5. a kind of according to claim 1 delay line interferometer based on polarised light is characterized in that: described delay line interference device includes the polarization spectro sheet
(5.1), polarization spectro sheet
(5.2), the 7th quarter-wave plate (5.3), polarization spectro sheet
(5.4), reflector plate
(5.5), phase-shifter three (5.6), speculum four (5.7), speculum the five (5.8), the tenth half-wave plate (5.9), the 12 move bundle device (5.10), the tenth half of wave plate (5.11), the 13 is moved bundle device (5.12) and Faraday rotator (5.13), described polarization spectro sheet
(5.1) oblique exiting surface one side that is arranged at first quarter-wave plate (1.3), described speculum five (5.8) and polarization spectro sheet
(5.2) be arranged at the polarization spectro sheet respectively
(5.1) above and below, described polarization spectro sheet
(5.1), polarization spectro sheet
(5.2) and speculum five (5.8) be parallel to each other, the described the 13 moves exiting surface one side that bundle device (5.12) is positioned at speculum five (5.8), described the tenth half of wave plate (5.11) is inserted in speculum the five (5.8) and the 13 and moves between the bundle device (5.12), and described Faraday rotator (5.13) is inserted in the polarization spectro sheet
(5.1) and the polarization spectro sheet
(5.2) between, described the tenth half-wave plate (5.9) and the 7th quarter-wave plate (5.3) lay respectively at the polarization spectro sheet
(5.2) the left and right sides, the described the 12 moves exiting surface one side that bundle device (5.10) is arranged at the tenth half-wave plate (5.9), described polarization spectro sheet
(5.4) oblique exiting surface one side that is arranged at the 7th quarter-wave plate (5.3), described speculum four (5.7) is positioned at the polarization spectro sheet
(5.4) right side, described phase-shifter three (5.6) is inserted in the polarization spectro sheet
(5.4) and between the speculum four (5.7), and described phase-shifter three (5.6) only covers one road light, described reflector plate
(5.5) be arranged at the polarization spectro sheet
(5.4) top, and described reflector plate
(5.5) with the polarization spectro sheet
(5.4) parallel setting.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020599890 CN201846339U (en) | 2010-11-10 | 2010-11-10 | Delay line interferometer based on polarized light |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020599890 CN201846339U (en) | 2010-11-10 | 2010-11-10 | Delay line interferometer based on polarized light |
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| CN201846339U true CN201846339U (en) | 2011-05-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103379069A (en) * | 2012-04-13 | 2013-10-30 | 菲尼萨公司 | Non-heating DQPSK and / or DPSK demodulator |
| CN104038291A (en) * | 2014-06-26 | 2014-09-10 | 吴学斌 | Integrated demodulation receiver |
| CN113405489A (en) * | 2021-08-19 | 2021-09-17 | 南京施密特光学仪器有限公司 | Method for inhibiting wave plate delay error interference in dynamic interferometer |
-
2010
- 2010-11-10 CN CN 201020599890 patent/CN201846339U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103379069A (en) * | 2012-04-13 | 2013-10-30 | 菲尼萨公司 | Non-heating DQPSK and / or DPSK demodulator |
| CN103379069B (en) * | 2012-04-13 | 2016-10-05 | 菲尼萨公司 | Without hot DQPSK and/or DPSK demodulator |
| CN104038291A (en) * | 2014-06-26 | 2014-09-10 | 吴学斌 | Integrated demodulation receiver |
| CN104038291B (en) * | 2014-06-26 | 2016-08-24 | 吴学斌 | A kind of integrated demodulation receiver |
| CN113405489A (en) * | 2021-08-19 | 2021-09-17 | 南京施密特光学仪器有限公司 | Method for inhibiting wave plate delay error interference in dynamic interferometer |
| CN113405489B (en) * | 2021-08-19 | 2021-11-02 | 南京施密特光学仪器有限公司 | Method for inhibiting wave plate delay error interference in dynamic interferometer |
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