Page 200 - Fiber Bragg Gratings

4.7 Radiation mode couplers 177

Figure 4.29: Radiation loss from a long-period grating as a function of the
index of the oil that surrounds the fiber (from: Stegall D B and Erdogan T, "Long
period fiber for grating devices based on leaky cladding modes," in Bragg Gratings,
Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and
Fundamentals, Vol. 17, OSA Technical Digest Series (Optical Society of America,
Washington DC, 1997), paper BSuB2, pp. 16-18.).