title: Analysis of mode-hop free tuning of folded cavity grating feedback lasers.
abstract: We analytically study an external cavity laser structure including a folded cavity. A steering mirror is utilized in the folded cavity to deflect the intracavity laser beam. A mode-hop free tuning range of ∼400  GHz can be achieved by control of the steering mirror, and a fast tuning rate is expected because of the small mass of the steering mirror. This technique has potential for applications in spectroscopy for turbulent media, especially in the mid-infrared region.
authors.forename: Jinyi
authors.initials: J
authors.lastname: Yan
authors.forename: Qian
authors.initials: Q
authors.lastname: Gong
authors.forename: Jinjin
authors.initials: J
authors.lastname: Gao
authors.forename: Chunfang
authors.initials: C
authors.lastname: Cao
authors.forename: Yang
authors.initials: Y
authors.lastname: Wang
authors.forename: Haixin
authors.initials: H
authors.lastname: Xu
authors.forename: Wangpeng
authors.initials: W
authors.lastname: Zhao
authors.forename: Hailong
authors.initials: H
authors.lastname: Wang