supported in part by the National "973" Program of China(No.2011CB301700);the National Natural Science Foundation of China(Nos.61007052, 61071011,61107041,61127016);the International Cooperation Project from the Ministry of Science and Technology of China(No.2011FDA11780);the STCSM Project(Nos.09JC1408100,10DJ1400402);the "SMC Young Star" Scientist Program of Shanghai Jiao Tong University;the National Key Lab Projects(No. GKZD030021)
A modal interferometer is experimentally demonstrated based on tapering a single-mode-multimode-single- mode (SMS) fiber structure heated by hydrogen flame. The interference fringe begins to form when tapering lengt...