Abstract
Optical fibers of diameter were coated with a sputter-deposited layer ( thick) of titanium ()-doped amorphous aluminum nitride. When optically pumped by an Nd:YAG green laser at , laser action was observed in whispering gallery modes around the fiber (in a ring shape) at with a quality factor . Other modes were also observed between 775 and . The primary and secondary modes give a mode separation of . No waveguide modes were observed in the cavity.
© 2010 Optical Society of America
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