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.
© 2005 Optical Society of America
Seung Kwan Kim, Han Seb Moon, and Jung-Chul Seo, "Coherence effect on the measurement of optical fiber nonlinear coefficient," Opt. Lett. 30, 1120-1122 (2005)