Narrow-linewidth resonant optical device, transmitter, system, and method

US4852960A · kind A · utility

Assignee

• American Telephone and Telegraph Company, AT&T Bell Laboratories · US

Inventors

• Rodney C. Alferness · Holmdel, US
• Charles H. Henry · Skillman, US
• Rudolf F. Kazarinov · Bound Brook, US
• Nils A. Olsson · Gillette, US
• Kenneth J. Orlowsky · Middlesex, US

Key dates

• Filing date: Sep 23, 1988
• Grant date: Aug 1, 1989
• Expiry date: Sep 23, 2008

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S5/142
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Highly frequency-selective reflectivity is realized in an optical device including a waveguide and an evanescent-field coupled grating resonator cavity. The device may include a light source and serve as a low-chirp, narrow-linewidth communications laser for use, e.g., for transmission over a fiber having non-negligible dispersion and also in wavelength-multiplexed coherent systems.