Abstract

We present a spatial acquisition scheme based on a fish-eye lens and a sinusoidal amplitude grating that can acquire laser beacons in an ultrawide field of view for atmospheric optical links. In this scheme, an incoming laser beacon can be imaged into three diffraction spots. The laser direction and the wavelength can be measured from the center position of the spots and the distance between two adjacent spots, respectively. The total optical transfer function can be described by the combined effect of the acquisition system itself and the spatial coherence degradation due to atmospheric turbulence. Spot spread and spot dancing effects are both considered for long-term exposure and short-term exposure. We investigate how root mean square errors of the measured laser direction and wavelength vary with the ratio of the pupil diameter D2 to atmospheric coherence length r0, without consideration of aberrations of the fish-eye lens. The results show that with the limitation of r0 the performance cannot be infinitely improved by enlarging D2. When considering aberrations of the fish-eye lens, the imaged spot is gradually blurred and deteriorated with the increase of the field angle, since aberrations are enlarged with the increase of the field angle. We study how the measured errors of laser direction and wavelength vary with r0 and incident angles (with different aberrations). A severe turbulence with a small value of r0 and a large incident angle will cause a bad acquisition performance.

© 2015 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Acquisition probability analysis of ultra-wide FOV acquisition scheme in optical links under impact of atmospheric turbulence

Bo Tu, Lu Liu, Yihui Liu, Ye Jin, and Junxiong Tang
Appl. Opt. 52(14) 3147-3155 (2013)

Aperture-array acquisition scheme for optical links in atmospheric turbulence

Xuelian Ma, Lu Liu, Xiaoning Zhang, and Junxiong Tang
Appl. Opt. 49(4) 718-723 (2010)

Accurate beacon positioning method for satellite-to-ground optical communication

Qiang Wang, Ling Tong, Siyuan Yu, Liying Tan, and Jing Ma
Opt. Express 25(25) 30996-31005 (2017)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (57)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription