Lanthanum titanate single crystal electro-optic modulator
First Claim
Patent Images
1. AN INTENSTY MODULATOR FOR A LIGHT BEAM COMPRISING:
- A. A CRYSTOL ELEMENT HAVING A RECTANGULAR PARALLELIPED SHAPE ELONGATED IN THE DIRECTION PARALLEL TO THE NATURAL CLEAVAGE PLANE AND NORMAL TO BOTH OF THE OPTIC AXES OF SAID CRYSTAL ELEMENT, SAID CRYSTAL ELEMENT COMPRISING A SINGLE CRYSTAL HAVING A NORMINAL COMPOSITION OF LA2 TI2 07, B. FIRST AND SECOND LIGHT POLARIZERS HAVING POLARIZATION DIRECTION AT RIGHT ANGLES, C. MEANS FOR IMPROVING AN ELECTRIC FIELD ACROSS SAID CRYSTAL ELEMENT IN A DIRECTION PARALLEL TO SAID NATURAL CLEAVAGE PLANE AND PARALLEL TO A PLANE CONTAINING BOTH OF SAID OPTIC AXES OF SAID CRYSTAL ELEMENT, WHEREIN ALIGHT BEAM IS TRANSIMITTED THROUGH SAID FIRST POLARIZER, SAID CRYSTAL ELEMENT AND SAID SECOND POLARIZER IN SUCCESSION IN SAID DIRECTTION PARALLEL TO SAID NATRAL CLEAVAGE PLANE AND NORMAL TO BOTH OF SAID OPTIC AXES OF SAID CRYSTAL ELEMENT, AND THE INTENSITY LIGHT BEAM IS MODIFIED BY THE LINEAR
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Abstract
An optical modulator is disclosed in which a lanthanum titanate single crystal is employed as the electro-optic material. Intensity, frequency, or phase modulation of either continuous or pulsed laser beams may be achieved by the modulator which may be operated over a broad bandwidth including the visible spectrum at low modulation voltage and power.
9 Citations
2 Claims
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1. AN INTENSTY MODULATOR FOR A LIGHT BEAM COMPRISING:
- A. A CRYSTOL ELEMENT HAVING A RECTANGULAR PARALLELIPED SHAPE ELONGATED IN THE DIRECTION PARALLEL TO THE NATURAL CLEAVAGE PLANE AND NORMAL TO BOTH OF THE OPTIC AXES OF SAID CRYSTAL ELEMENT, SAID CRYSTAL ELEMENT COMPRISING A SINGLE CRYSTAL HAVING A NORMINAL COMPOSITION OF LA2 TI2 07, B. FIRST AND SECOND LIGHT POLARIZERS HAVING POLARIZATION DIRECTION AT RIGHT ANGLES, C. MEANS FOR IMPROVING AN ELECTRIC FIELD ACROSS SAID CRYSTAL ELEMENT IN A DIRECTION PARALLEL TO SAID NATURAL CLEAVAGE PLANE AND PARALLEL TO A PLANE CONTAINING BOTH OF SAID OPTIC AXES OF SAID CRYSTAL ELEMENT, WHEREIN ALIGHT BEAM IS TRANSIMITTED THROUGH SAID FIRST POLARIZER, SAID CRYSTAL ELEMENT AND SAID SECOND POLARIZER IN SUCCESSION IN SAID DIRECTTION PARALLEL TO SAID NATRAL CLEAVAGE PLANE AND NORMAL TO BOTH OF SAID OPTIC AXES OF SAID CRYSTAL ELEMENT, AND THE INTENSITY LIGHT BEAM IS MODIFIED BY THE LINEAR
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2. The modulator as claimed in claim 1, in which the molecular ratio of La2O3 to TiO2 in said crystal element varies from 0.9:
- 2 to 1.1;
2.
- 2 to 1.1;
Specification
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Current AssigneeKikuo Doi, Masakazu Kimura, Satoshi Nanamatsu, Shigeo Matsushita
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Original AssigneeKikuo Doi, Masakazu Kimura, Satoshi Nanamatsu, Shigeo Matsushita
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InventorsKimura, Masakazu, Doi, Kikuo, Matsushita, Shigeo, Nanamatsu, Satoshi
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Primary Examiner(s)Corbin, John K.
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Application NumberUS05/445,349Time in Patent Office540 DaysField of Search350/150,16R 252/62.9US Class Current359/251CPC Class CodesG02F 1/0018 Electro-optical materials
