CN210376933U - Optical fiber electro-optic modulator - Google Patents
Optical fiber electro-optic modulator Download PDFInfo
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- CN210376933U CN210376933U CN201921414248.7U CN201921414248U CN210376933U CN 210376933 U CN210376933 U CN 210376933U CN 201921414248 U CN201921414248 U CN 201921414248U CN 210376933 U CN210376933 U CN 210376933U
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Abstract
The utility model discloses an optic fibre electro-optic modulator, it includes incident single optical fiber collimator, polarization beam splitter, first wave plate, PLZT electro-optic ceramic crystal, second wave plate, polarization beam combiner and emergent single optical fiber collimator according to the preface, the electrode has been plated respectively on the relative both sides face of PLZT electro-optic ceramic crystal, and this electrode comprises at least one triangle-shaped region. The utility model discloses an electro-optic modulator of big electrooptical coefficient pottery such as PLZT or the preparation of crystal material then can realize the equal effect of acousto-optic modulator in less size, lower cost. Further, the electro-optic modulator may achieve a higher modulation frequency than the acousto-optic modulator.
Description
Technical Field
The utility model relates to an optics and optical communication field especially relate to an optic fibre electro-optic modulator.
Background
Acousto-optic modulators have been widely used in fiber lasers and have been used in fiber optic communication transmission experiments. The mechanism of the acousto-optic device makes it impossible to further reduce its size and the cost of the high frequency acoustic wave generator is also extremely high.
Disclosure of Invention
An object of the utility model is to provide a small in size, with low costs optic fibre electro-optic modulator.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an optical fiber electro-optic modulator sequentially comprises an incident single optical fiber collimator, a polarization beam splitter, a first wave plate, a PLZT electro-optic ceramic crystal, a second wave plate, a polarization beam combiner and an emergent single optical fiber collimator, wherein two opposite side surfaces of the PLZT electro-optic ceramic crystal are respectively plated with an electrode, and the electrode consists of at least one triangular area;
the light beam emitted by the incident single optical fiber collimator is divided into o light and e light with mutually vertical polarization directions after passing through the polarization beam splitter, the o light is emitted from the polarization beam splitter and directly enters the PLZT electro-optic ceramic crystal, the e light is emitted from the polarization beam splitter and then enters the PLZT electro-optic ceramic crystal after passing through the first wave plate, the o light and the e light are deflected after voltage is applied to an electrode on the PLZT electro-optic ceramic crystal, then the o light enters the polarization beam combiner, the e light enters the polarization beam combiner after passing through the second wave plate and is combined with the o light, and the combined light finally enters the emergent single optical fiber collimator.
The electrode is composed of two right-angled triangular areas which are arranged from top to bottom in sequence, and the hypotenuses of the two triangular areas are parallel to each other.
The polarization beam splitter and the polarization beam combiner are respectively walk-off crystals.
The first wave plate and the second wave plate are both half-wave plates.
An optical fiber electro-optic modulator sequentially comprises a double optical fiber collimator, a polarization beam splitter/combiner, a wave plate and a PLZT electro-optic ceramic crystal, wherein two opposite side surfaces of the PLZT electro-optic ceramic crystal are respectively plated with an electrode, the electrode consists of at least one triangular area, and the emergent surface of the PLZT electro-optic ceramic crystal is plated with a reflecting film;
the light beam emitted by an incident light fiber head of the double-fiber collimator is divided into o light and e light with mutually vertical polarization directions after passing through the polarization beam splitter/combiner, the o light is emitted from the polarization beam splitter/combiner and directly enters the PLZT electro-optic ceramic crystal, the e light is emitted from the polarization beam splitter and then enters the PLZT electro-optic ceramic crystal after passing through the wave plate, the o light and the e light are deflected after the voltage is applied to the electrodes on the PLZT electro-optic ceramic crystal, and the o light and the e light return to the original path after passing through the reflecting film and finally enter the emergent light fiber head of the double-fiber collimator.
The electrode is composed of two right-angled triangle areas which are arranged from top to bottom in sequence, a right-angled edge of each right-angled triangle area is attached to each other, and the hypotenuses of the two triangle areas are symmetrical to each other.
The polarization beam splitter/combiner is a walk-off crystal.
The wave plate is a half-wave plate.
The utility model adopts the above technique, following beneficial effect has: the utility model discloses an electro-optic modulator of big electrooptical coefficient pottery such as PLZT or the preparation of crystal material then can realize the equal effect of acousto-optic modulator in less size, lower cost. Further, the electro-optic modulator may achieve a higher modulation frequency than the acousto-optic modulator.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments;
fig. 1 is a schematic view of embodiment 1 of the present invention;
fig. 2 is a schematic view of embodiment 2 of the present invention;
fig. 3 is a schematic view of embodiment 3 of the present invention;
fig. 4 is a schematic view of embodiment 4 of the present invention.
Detailed Description
As shown in fig. 1 or fig. 2, the present invention relates to an optical fiber electro-optic modulator, which sequentially comprises an incident single optical fiber collimator 1, a polarization beam splitter 2, a first wave plate 3, a PLZT electro-optic ceramic crystal 4, a second wave plate 5, a polarization beam combiner 6 and an emergent single optical fiber collimator 7, wherein two opposite side surfaces of the PLZT electro-optic ceramic crystal 4 are respectively plated with an electrode, and the electrode is composed of at least one triangular region; the polarization beam splitter 2 and the polarization beam combiner 6 are respectively a walk-off crystal, and the first wave plate 3 and the second wave plate 5 are both half-wave plates.
The utility model discloses in, the light beam that incident single optical fiber collimator 1 jetted out falls into polarization direction mutually perpendicular's o light and e light behind polarization beam splitter 2, o light jets out and directly gets into in PLZT electro-optic ceramic crystal 4 from polarization beam splitter 2, and e light jets out back from polarization beam splitter 2 and re-gets into in PLZT electro-optic ceramic crystal 4 behind first wave plate 3, electrode on PLZT electro-optic ceramic crystal 4 is after applying voltage, o light and e light realize the deflection, then o light gets into in polarization beam combiner 6, and e light gets into polarization beam combiner 6 behind the second wave plate 5 and with o light beam combiner, beam combiner gets into in emergent single optical fiber collimator 7 at last.
Example 1, as shown in fig. 1, the electrode consists of a single right-angled triangular area. In the embodiment 2, as shown in fig. 2, the electrode is composed of two right-angled triangular regions arranged sequentially from top to bottom, and the hypotenuses of the two triangular regions are parallel to each other, so that the size of the PLZT electro-optic ceramic crystal 4 in the length direction can be reduced by the scheme, because the included angle between the hypotenuse of the right-angled triangle and the PLZT electro-optic ceramic crystal 4 in the length direction is smaller, the deflection angle is larger, and the final required voltage is smaller.
As shown in fig. 3 or fig. 4, an optical fiber electro-optic modulator sequentially includes a dual optical fiber collimator 1, a polarization beam splitter/combiner 2, a wave plate 3 and a PLZT electro-optic ceramic crystal 4, wherein two opposite side surfaces of the PLZT electro-optic ceramic crystal 4 are respectively plated with an electrode, the electrode is composed of at least one triangular region, and an exit surface of the PLZT electro-optic ceramic crystal 4 is plated with a reflective film; the polarization beam splitter/combiner 2 is a walk-off crystal, and the wave plate 3 is a half-wave plate 3.
The utility model discloses in, the light beam that the optical fiber head of the incident light of two optical collimator 1 jetted out falls into polarization direction mutually perpendicular's o light and e light behind polarization beam splitter/beam combiner 2, the o light jets out and directly gets into in PLZT electro-optic ceramic crystal 4 from polarization beam splitter 2, and the e light jets out the back from polarization beam splitter and re-gets in PLZT electro-optic ceramic crystal 4 behind wave plate 3 in, the electrode on PLZT electro-optic ceramic crystal 4 is after applying voltage, o light and e light realize the deflection, o light and e light return in the final emergent optical fiber head that gets into two optical collimator 1 through the former way behind the reflectance coating.
Example 4, as shown in fig. 4, the electrode is composed of two right-angled triangular regions sequentially arranged from top to bottom, a right-angled side of the two right-angled triangular regions is attached to each other, and hypotenuses of the two triangular regions are symmetrical to each other. And the final electrode preparation difficulty is reduced by integrating two triangular areas back to back.
The practice of the present invention has been described with reference to the accompanying drawings, but the invention is not limited to the embodiments described above, which are illustrative rather than limiting, and it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (8)
1. A fiber optic electro-optic modulator, characterized by: the device sequentially comprises an incident single optical fiber collimator, a polarization beam splitter, a first wave plate, a PLZT electro-optic ceramic crystal, a second wave plate, a polarization beam combiner and an emergent single optical fiber collimator, wherein two opposite side surfaces of the PLZT electro-optic ceramic crystal are respectively plated with an electrode, and the electrode consists of at least one triangular area;
the light beam emitted by the incident single optical fiber collimator is divided into o light and e light with mutually vertical polarization directions after passing through the polarization beam splitter, the o light is emitted from the polarization beam splitter and directly enters the PLZT electro-optic ceramic crystal, the e light is emitted from the polarization beam splitter and then enters the PLZT electro-optic ceramic crystal after passing through the first wave plate, the o light and the e light are deflected after voltage is applied to an electrode on the PLZT electro-optic ceramic crystal, then the o light enters the polarization beam combiner, the e light enters the polarization beam combiner after passing through the second wave plate and is combined with the o light, and the combined light finally enters the emergent single optical fiber collimator.
2. A fiber optic electro-optic modulator according to claim 1 wherein: the electrode is composed of two right-angled triangular areas which are arranged from top to bottom in sequence, and the hypotenuses of the two triangular areas are parallel to each other.
3. A fiber optic electro-optic modulator according to claim 1 wherein: the polarization beam splitter and the polarization beam combiner are respectively walk-off crystals.
4. A fiber optic electro-optic modulator according to claim 1 wherein: the first wave plate and the second wave plate are both half-wave plates.
5. A fiber optic electro-optic modulator, characterized by: the double-fiber polarization beam splitter/combiner sequentially comprises a double-fiber collimator, a polarization beam splitter/combiner, a wave plate and a PLZT electro-optic ceramic crystal, wherein two opposite side surfaces of the PLZT electro-optic ceramic crystal are respectively plated with an electrode, the electrode consists of at least one triangular area, and the emergent surface of the PLZT electro-optic ceramic crystal is plated with a reflecting film;
the light beam emitted by an incident light fiber head of the double-fiber collimator is divided into o light and e light with mutually vertical polarization directions after passing through the polarization beam splitter/combiner, the o light is emitted from the polarization beam splitter/combiner and directly enters the PLZT electro-optic ceramic crystal, the e light is emitted from the polarization beam splitter and then enters the PLZT electro-optic ceramic crystal after passing through the wave plate, the o light and the e light are deflected after the voltage is applied to the electrodes on the PLZT electro-optic ceramic crystal, and the o light and the e light return to the original path after passing through the reflecting film and finally enter the emergent light fiber head of the double-fiber collimator.
6. A fiber optic electro-optic modulator according to claim 5 wherein: the electrode is composed of two right-angled triangle areas which are arranged from top to bottom in sequence, a right-angled edge of each right-angled triangle area is attached to each other, and the hypotenuses of the two triangle areas are symmetrical to each other.
7. A fiber optic electro-optic modulator according to claim 5 wherein: the polarization beam splitter/combiner is a walk-off crystal.
8. A fiber optic electro-optic modulator according to claim 5 wherein: the wave plate is a half-wave plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921414248.7U CN210376933U (en) | 2019-08-28 | 2019-08-28 | Optical fiber electro-optic modulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921414248.7U CN210376933U (en) | 2019-08-28 | 2019-08-28 | Optical fiber electro-optic modulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210376933U true CN210376933U (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921414248.7U Active CN210376933U (en) | 2019-08-28 | 2019-08-28 | Optical fiber electro-optic modulator |
Country Status (1)
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| CN (1) | CN210376933U (en) |
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2019
- 2019-08-28 CN CN201921414248.7U patent/CN210376933U/en active Active
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