Lim Jong H, Jang Hyun S, Lee Kyung S, Kim Jin C, Lee Byeong H
School of Information and Communications Engineering, SungKyunKwan University, Suwon 440-746, Korea.
Opt Lett. 2004 Feb 15;29(4):346-8. doi: 10.1364/ol.29.000346.
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 deltam approximately equal to 2.8 x 10(-3).
我们展示了在光子晶体光纤（PCF）中形成的全光纤马赫-曾德尔干涉仪的实现。我们通过在PCF中机械诱导两个相同的长周期光纤光栅（LPG）来形成全PCF马赫-曾德尔干涉仪。研究了LPG和LPG对的光谱特性。在LPG对的阻带内形成的干涉条纹随光栅的周期和强度而变化，并且条纹间距随着光栅间距的增加而减小。通过条纹间距测量，计算出PCF的差分有效群折射率约为δm≈2.8×10⁻³。
