Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) Estimated light intensity distribution on the etalon surface at 1560 nm, an off-resonance optical wavelength. The −3 dB spot size was 1.3 mm in diameter. (b) Reflection spectra measured at the positions indicated by circles in (a) indexed row by row from the top-left corner.
