Electrooptic modulation element
A modulation element, electro-optical technology, applied in the fields of optics, nonlinear optics, electromagnetic field characteristics, etc., can solve the problems of difficult components, difficult to implement non-reflective coatings, and reduced modulation efficiency.
Inactive Publication Date: 2008-04-09
NIPPON TELEGRAPH & TELEPHONE CORP
View PDF15 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0014] Here, in order to make the distance between a pair of electrodes extremely short, although it is necessary to thin the electro-optic crystal, it is extremely difficult to make an element using a thin crystal below the order of millimeters. damage problem
[0015] In addition, although it is desirable to apply a non-reflective coating to the end surface of the incident light of the electro-optic crystal, if the electro-optic crystal is too thin, there is a problem that it is difficult to apply a non-reflective coating.
[0016] From another point of view, in order to improve the sensitivity of the electric field sensor, although as mentioned above, it is only necessary to increase the length of the electro-optic crystal in the direction of light passing, but in order to increase the intensity of the part affected by the thinning of the electro-optic crystal On the other hand, when a specific structure is adopted for the electro-optic crystal, light does not exit from the end face of the electro-optic crystal. Due to light diffraction, the longer the above-mentioned length is, the more likely light leakage occurs in the side direction, thereby reducing the modulation efficiency and reducing the sensitivity. decline
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0073] Hereinafter, embodiments of the present invention will be described using the drawings.
[0074] Figure 3A and Figure 3B It is a partial perspective perspective view and a cross-sectional view respectively showing an electro-optical modulation element according to an embodiment of the present invention.
[0075] Figure 3A and Figure 3BThe electro-optical modulation element of the illustrated embodiment is constituted by an electro-optical crystal 1 and a pair of electrodes 5a, 5b. The electro-optic crystal 1 has a pair of grooves processed from the end face 1c across the end face 1d in the respective longitudinal directions of the side face 1a and the opposite face 1b; the electrodes 5a, 5b are embedded in the pair of grooves. metal composition in. Also, if Figure 3B As shown, each of the pair of grooves has a rectangular cross-sectional shape, and the pair of electrodes 5a, 5b almost completely fills each groove. In other words, if Figure 3B As shown, combi...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
Login to View More
Abstract
Grooves (3a, 3b) are formed in a pair of opposed side surfaces (1a, 1b) of an electrooptic crystal (1) such that the bottom surfaces of the grooves are close to each other so that the distance between the bottom surfaces does not exceed a predetermined distance. A pair of electrodes (5a, 5b) are formed in the grooves so as to substantially completely fill the grooves (3a, 3b).
Description
technical field [0001] The present invention relates to an electro-optic (Electro-Optic: EO) crystal having a birefringence that changes due to a coupling electric field, and a pair of electrodes provided to sandwich the electro-optic crystal in order to couple an electric field to the electro-optic crystal, through the pair of electrodes An electro-optic modulation element that couples an electric field and changes the polarized light of light incident between a pair of electrodes according to the change of the birefringence with the electric field intensity, especially relates to an improved strength without compromising the strength and without causing an increase in size. Modulation efficiency and sensitivity, while having an electro-optical modulation element with flat frequency characteristics. Background technique [0002] An electro-optical modulation element using an electro-optical crystal is used as an electro-optical modulator that modulates the phase of passing ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/03G01R29/08G01R29/12
Inventor 佐佐木爱一郎品川满
Owner NIPPON TELEGRAPH & TELEPHONE CORP