title: Coherence effect on the measurement of optical fiber nonlinear coefficient.
abstract: We investigated a source coherence effect on the measurement of the optical fiber nonlinear coefficient by use of dual optical frequencies. We produced coherent and incoherent dual optical frequencies with a self-heterodyne Mach-Zehnder interferometer with and without a delay line, respectively. Our measurement results included both an electrostrictive and a Kerr nonlinear coefficient because of the low modulation frequency. Comparing the coherent case with an incoherent case, we obtained a nonlinear coefficient that was more than 3% higher in the coherent case.
authors.affiliation: Optical Metrology Division, Korea Research Institute of Standards and Science, 1 Doryong-Dong, Yuseong-Gu, Daejeon 305-340, South Korea. skkfiber@kriss.re.kr
authors.forename: Seung Kwan
authors.initials: SK
authors.lastname: Kim
authors.forename: Han Seb
authors.initials: HS
authors.lastname: Moon
authors.forename: Jung-Chul
authors.initials: JC
authors.lastname: Seo