Stimulated four-photon mixing (SFPM) has been observed up to four orders in a 300-m-long, low-loss, large-core multimode silica fiber pumped by a dual-frequency dye laser. The phase-matching condition for SFPM was uncritically achieved in the multimode fiber, so that, by varying the frequency separation of the two laser lines, it was possible to tune continuously an intense line generated by SFPM under the Raman-gain curve in the range of 350 to 495 cm−1.
© 1984 Optical Society of America
Original Manuscript: November 30, 1983
Manuscript Accepted: December 27, 1983
Published: March 1, 1984
R. Pini, M. Matera, Chinlon Lin, R. Salimbeni, and A. F. M. Y. Haider, "Continuously tunable multiple-order stimulated four-photon mixing in a multimode silica fiber," Opt. Lett. 9, 79-81 (1984)