Abstract
In a recent Letter [Opt. Lett. 43, 2571 (2018)], Vengelis et al. have claimed to implement a new experimental technique for measuring the phase refractive index of a photonic crystal fiber mode. Unfortunately, while the experimental effort is appreciated, one of the key assumptions was inaccurate. Taking this error into account reveals that the measured value was the fiber's group index, rather than its phase refractive index. (c) 2018 Optical Society of America
Original language | English |
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Pages (from-to) | 85-85 |
Number of pages | 1 |
Journal | Optics Letters |
Volume | 44 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Jan 2019 |
Funding
Publisher Copyright: © 2018 Optical Society of America.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics