title: Editorial: Celebration of Optics Letters' 40th Anniversary.
abstract: Editor-in-Chief Xi-Cheng Zhang recognizes the 40th anniversary of Optics Letters, reflects on the standing of the journal in the optics and photonics community, and announces the special features that will mark the occasion throughout 2017.
authors.forename: Xi-Cheng
authors.initials: XC
authors.lastname: Zhang