Materials science

Borosilicate glass

Dopant

Thermal expansion

Physical chemistry

Polarization (electrochemistry)

Linear polarization

Laser

Physics

Cladding (metalworking)

Optics

Doping

Composite material

Chemistry

Birefringence

Optoelectronics

Elliptical polarization

Applied Optics

Experimental results indicate that the stress-induced strain birefringence in borosilicate elliptically clad fibers arises from the expansion coefficient mismatch between the borosilicate elliptical cladding and the pure silica outer jacket. This strain birefringence cannot be annealed even after repeated thermal cycling. It is shown that, for a given dopant concentration, the birefringence depends primarily on the cladding ellipticity ∊ and increases linearly with increasing ellipticity and expansion coefficient mismatch.

Birefringence in elliptically clad borosilicate single-mode fibers