Axicon-based writing of waveguides in BK7 glass

作者：Dharmadhikari Jayashree A; Bernard Rodney; Bhatnagar Anuj K; Mathur Deepak; Dharmadhikari Aditya K^*

来源：Optics Letters, 2013, 38(2): 172-174.

DOI：10.1364/OL.38.000172

We report on the direct writing of waveguide structures using an axicon lens to focus a 40 fs laser pulse within BK7 glass. The written structures are characterized for waveguiding action: waveguiding action for 635 and 1550 nm light and propagation loss as low as 0.19 dB/cm is measured. Loss values decrease with laser exposure time for incident energy of 300 mu J, indicating enhancement of index contrast. At higher energies, a reverse trend is obtained: higher loss values are obtained as index contrast degrades with an increase in exposure time.

• 出版日期2013-1-15