Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1537618 | Optics Communications | 2011 | 5 Pages |
Abstract
Borosilicate glass (BK7) is a widely-used material in integrated optics devices and in the optical communications industry. We report on laser-written waveguiding in BK7 glass using a low-repetition-rate (1 kHz) laser producing 40 fs pulses of 800 nm light. A 500 μm slit is used to write structures 100 μm below the glass surface. These waveguides show strong guidance at 635 nm, with an index contrast of 3 × 10− 4 and a propagation loss of ~ 0.5 dB/cm. We measured the change in refractive index for a range of writing conditions as quantified in terms of energy dose; there is an energy dose window (> 0.6 μJ μm− 3 and < 1.5 μJ μm− 3) within which the written structures show guidance.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
J.A. Dharmadhikari, A.K. Dharmadhikari, A. Bhatnagar, A. Mallik, P. Chandrakanta Singh, Reji K. Dhaman, K. Chalapathi, D. Mathur,