title: Single-mode-fiber 1 x N directional coupler.
abstract: We report the development of an adjustable single-mode-fiber multiterminal directional coupler that exhibits efficient coupling and uniform terminal output over a wide range of coupling coefficients. The device is made using a new technique that employs silicon V-groove substrates in the fabrication of arrays of evanescently coupled taps on single-mode fibers. The coupler is highly directional and polarization independent and exhibits excess loss as low as 0.09 dB per terminal in a 1 x 7 device. The fabrication technique may be extended to produce devices having large numbers of terminals. Applications include use in fiber data-bus systems and as a tapped delay line for broadband signal processing.
authors.forename: S A
authors.initials: SA
authors.lastname: Newton
authors.forename: J E
authors.initials: JE
authors.lastname: Bowers
authors.forename: G
authors.initials: G
authors.lastname: Kotler
authors.forename: H J
authors.initials: HJ
authors.lastname: Shaw