Experimental results show that form birefringence of a coupler with an asymmetric waist cross section changes from positive to negative at a given degree of fiber fusion resulting in polarization insensitive operation.

It is pointed out from the discussion that in the opinion of physical mechanism strain-optic law is a basic and general law and the form birefringent is an important factor that affects the precision of the orthotropic photoelastic experiment.

The gain flattening of L-band EDFA based on high-birefringence fiber loop mirror(Hi-Bi FLM) was experimentally demonstrated.

Holey fibers and the research of their birefringence;

Measurement of Birefringence in Polarization-Maintaining Optical Fibers by Using Heterodyne Polarimetric Interference;

Thermally-induced birefringence of polarization optical fiber on gyro;

Measurement of birefringence of a single axis crystal varying with temperature based on double light paths;

Study of quartz crystal′s birefringence dispersion character from ultraviolet band to near infrared band;

The specific rotation-temperature characteristic of this kind cholesteric liquid crystal is measured by means of magneto-optic modulate frequency multiplication,and the variations of screwpitch,refractive index and birefringence with temperature of this kind cholesteric li.