Photosensitivity in phosphate glass doped with Ag[sup +] upon exposure to near-ultraviolet femtosecond laser pulses

Watanabe, Yuichi; Namikawa, Gaku; Onuki, Teppei; Nishio, Keishi; Tsuchiya, Toshio
April 2001
Applied Physics Letters;4/9/2001, Vol. 78 Issue 15, p2125
Academic Journal
We report on a photosensitivity in soda-alumino-phosphate glass doped with silver ions Ag[sup +] upon exposure to near-ultraviolet femtosecond laser pulses. The photosensitivity, i.e., formation of color centers such as Ag[sup 0] and Ag[sup 2+] in the glass is found to be associated with intensity-dependent nonlinear optical process induced by extremely high irradiance up to ∼TW/cm[sup 2] of the femtosecond pulses. We demonstrate a bright orange fluorescence from the induced color centers inside the glass, that should be applicable to a functional optical device.


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