New beam splitter structure with relaxed constraints for electrooptic tunable filter /
Directional couplers with relaxed design requirements for applications in guided wave Electro-Optic Tunable Filters (EOTFs) have been proposed and fabricated in x-cut LiNbO₃ using the Ti-indiffusion technique. The fabricated waveguides were characterized at a 1.55 mm optical wavelength using a DFB l...
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
2001.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | Directional couplers with relaxed design requirements for applications in guided wave Electro-Optic Tunable Filters (EOTFs) have been proposed and fabricated in x-cut LiNbO₃ using the Ti-indiffusion technique. The fabricated waveguides were characterized at a 1.55 mm optical wavelength using a DFB laser. Fabrication parameters have been identified for devices that satisfy the required criteria for the sum of power transfer coefficients being equal to one. Two bending angles (0.6⁰ and 1.0⁰) were used in the design. Power transfer coefficients as a function of the separation gap "d", with diffusion time as a parameter, have shown similar trends for these two design angles. However the bending loss at 1.0⁰ was generally larger than the one with a 0.6⁰ angle. The best fabrication parameters to achieve ([]TE + []TM = 1) are with a Ti film thickness of 1060-1100[], a separation gap of about 11[], and a diffusion temperature of 1025⁰C for 11-12 hours. |
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| Item Description: | "Major subject: Electrical Engineering". Vita. |
| Physical Description: | x, 62 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references (leaves 42-43). |