Method of coupling optical parts and refractive index imaging material

• US 5,658,966 A
• Filed: 06/05/1995
• Issued: 08/19/1997
• Est. Priority Date: 11/09/1992
• Status: Expired due to Term

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Yoneda, Yasuhiro, Yoshimura, Tetsuzo, Tsukamoto, Koji, Ishitsuka, Takeshi, Motoyoshi, Katsusada
• Primary Examiner(s): CHAPMAN, MARK A
• Application Number:
  US08/462,598
• Time in Patent Office: 806 Days
• Field of Search: 522/99, 522/172, 385/96
• US Class Current: 522/99
• CPC Class Codes: G02B 6/2551 using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch
• CPC Class Codes: G02B 6/2555 Alignment or adjustment devices for aligning prior to splicing
• CPC Class Codes: G02B 6/262 Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements
• CPC Class Codes: G02B 6/2835 formed or shaped by thermal treatment, e.g. couplers
• CPC Class Codes: G02B 6/42 Coupling light guides with opto-electronic elements
• CPC Class Codes: G02B 6/4204 the coupling comprising intermediate optical elements, e.g. lenses, holograms encapsulated active devices H01S5/02208, H01L33/52
• CPC Class Codes: G02B 6/4212 the intermediate optical element being a coupling medium interposed therebetween, e.g. epoxy resin, refractive index matching material, index grease, matching liquid or gel
• CPC Class Codes: G02B 6/4232 using the surface tension of fluid solder to align the elements, e.g. solder bump techniques flip-chip mounting techniques in assembly of semiconductor devices H01L24/81
• CPC Class Codes: G03F 7/001 Phase modulating patterns, e.g. refractive index patterns
• CPC Class Codes: G03F 7/0757 Macromolecular compounds containing Si-O, Si-C or Si-N bonds G03F7/0752 takes precedence

Abstract

A method of coupling optical parts including bonding the optical coupling faces of two optical waveguides by butting and fusing them. Also, a method for forming a refractive-index distribution having the focusing lens effect by setting the interval between the optical coupling faces of two optical parts to 0.1 mm or more, feeding a refractive-index imaging material also serving as an adhesive into the gap between the faces, and applying light to the refractive-index imaging material from the optical coupling face of at least one of the optical parts.

Claims

1. A refractive-index imaging material produced by the following method:

forming a mixture by dissolving, in a solvent, a first ethylene unsaturated compound whose general expression is R₁ CH--CHCOOR₂ in which R₁ is any one of CH₃ and H, and R₂ is a chain or alicyclic compound group with 1 to 4 carbon atoms, a second ethylene unsaturated compound containing silicone, and a thermopolymerization initiator;

heating and agitating the mixture to form a copolymer solution;

cooling the copolymer solution to a room temperature; and

adding to the cooled copolymer solution, a third ethylene unsaturated compound containing an aromatic ring or halogen, a multifunctional acrylate or a multifunctional methacrylate, and a photopolymerization initiator.

2. A refractive-index imaging material according to claim 1, wherein the third ethylene unsaturated compound containing the aromatic ring or halogen is any one of allylcarbazole, methacryloyloxyethylcarbazole, acryloylethyloxycarbazole, vinylcarbazole, vinylnaphthalene, naphtylacrylate, tribromophenylacrylate, dibromophenylacrylate, and phenoxyethylacrylate, or a mixture or any ones of these compounds.