title: Sensitive determination of the existence of higher-order modes in a quasi-single-mode fiber.
abstract: A novel and simple method for sensitive determination of the existence of higher-order modes in a quasi-singlemode fiber has been demonstrated. The method is based on the detection of interference between higher-order modes and the fundamental LP(01) mode within the fiber by using phase modulation generated by a piezoelectric transducer.
authors.forename: Y
authors.initials: Y
authors.lastname: Nakajima
authors.forename: S
authors.initials: S
authors.lastname: Ezekiel