Shigeki R Sakaguchi

US Patent:

50594753, Oct 22, 1991

Filed:

Jun 29, 1990

Appl. No.:

7/545874

Inventors:

Cheng-ko J. Sun - Worthington OH
Shigeki Sakaguchi - Worthington OH
Tadashi Miyashita - Upper Arlington OH

Assignee:

Photonic Integration Research, Inc. - Columbus OH

International Classification:

B32B 900

US Classification:

428195

Abstract:

An integrated optoelectrical circuit is described. An apparatus and method are disclosed whereby planar optical waveguides are formed on Al. sub. 2 O. sub. 3, other ceramics, silicon, silica, and other glass substrates that are thin film wired. An interface coating of silicon or silicon dioxide is applied to a surface of the thin film wired substrates using a low temperature deposition process such as sputtering or chemical vapor deposition. Glass cladding and core layers are deposited onto the thin film coating using a flame hydrolysis deposition technique. With this invention, channel waveguides and integrated optical circuits can be formed on a common substrate with electronic IC chips.

US Patent:

50642669, Nov 12, 1991

Filed:

Jul 5, 1990

Appl. No.:

7/548008

Inventors:

Cheng-ko J. Sun - Worthington OH
Shin Sumida - Columbus OH
Shigeki Sakaguchi - Worthington OH
Tadashi Miyashita - Upper Arlington OH

Assignee:

Photonic Integration Research, Inc. - Columbus OH

International Classification:

G02B 610

US Classification:

385132

Abstract:

An apparatus and method are disclosed whereby channel waveguides are formed to have substantially circular cross-section shapes to more closely match the circular cross-section shape of a typical optical fiber. Rectangular cross-section channel waveguides are heated to create surface tension between the core and cladding layers resulting in the rectangular shape changing to a substantially circular shape. An over cladding layer may be added to the circular cross-section waveguide. A method is also disclosed whereby monolithic lenses may be formed from the same circular cross-section waveguides on a common substrate, simultaneously, to provide substantially perfectly aligned lenses and waveguides that are not prone to alignment and bonding problems of discrete lenses.