Mach–Zehnder interferometer formed in a photonic crystal fiber based on a pair of long-period fiber gratings

Abstract

We demonstrate implementation of an all-fiber Mach–Zehnder interferometer formed in a photonic crystal fiber (PCF). We formed the all-PCF Mach–Zehnder interferometer by mechanically inducing two identical long-period fiber gratings (LPGs) in the PCF. The spectral properties of a LPG and a LPG pair were investigated. The interference fringe formed within the stop band of the LPG pair varied with the period and the strength of the gratings, and the fringe spacing was decreased with increasing grating separation. From the fringe spacing measurement the differential effective group index of the PCF was calculated to be $\mathrm{\Delta }m\approx 2.8\times {10}^{-3}$.

© 2004 Optical Society of America

All-fiber Mach-Zehnder type interferometers formed in photonic crystal fiber

Hae Young Choi, Myoung Jin Kim, and Byeong Ha Lee
Opt. Express 15(9) 5711-5720 (2007)

Tunable fiber gratings fabricated in photonic crystal fiber by use of mechanical pressure

Jong H. Lim, Kyung S. Lee, Jin C. Kim, and Byeong H. Lee
Opt. Lett. 29(4) 331-333 (2004)

Long period grating assistant photonic crystal fiber modal interferometer

Zhoulu Sun, Yan-ge Liu, Zhi Wang, Boyin Tai, Tingting Han, Bo Liu, Wentao Cui, Huifeng Wei, and Weijun Tong
Opt. Express 19(14) 12913-12918 (2011)

Dependence of fringe spacing on the grating separation in a long-period fiber grating pair

Byeong Ha Lee and Junji Nishii
Appl. Opt. 38(16) 3450-3459 (1999)

Intermodal interferometer with low insertion loss and high extinction ratio composed of a slight offset point and a matching long period grating in two-mode photonic crystal fiber

Wei Huang, Yan-ge Liu, Zhi Wang, Bo Liu, Junqi Guo, Mingming Luo, and Lie Lin
Appl. Opt. 54(2) 285-290 (2015)