Study of nonlinear phase error correction technique for synthetic aperture ladar

De'an Liu; Enwen Dai; Nan Xu; Liren Liu

doi:10.1117/12.826002

1 September 2009 Study of nonlinear phase error correction technique for synthetic aperture ladar

De'an Liu, Enwen Dai, Nan Xu, Liren Liu

Author Affiliations +

Proceedings Volume 7442, Optics and Photonics for Information Processing III; 744214 (2009) https://doi.org/10.1117/12.826002
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

Based on Fourier transform of heterodyne signal and linear fitting of phase time-evolution, a nonlinearity-induced phase error correction technique for synthetic aperture ladar is experimentally studied. The problem of beat frequency matching in the conventional method for nonlinearity-induced phase error correction in target channel by designing a reference channel and phase shift equations is practically analyzed, and its limitation on application under the condition of large time delay in target channel is verified. According to this problem, a new method of directly nonlinearity-induced phase error correction by linear fitting of phase time-evolution in target channel is proposed. In experiments, the rang resolution of 2 mm is gained at 1.5 μm wavelength, which is coincident well with theory. The results show that this technique can overcome the problem of beat frequency matching in two channels and is effective for practical applications with different time delay in target channel.

Citation Download Citation

De'an Liu, Enwen Dai, Nan Xu, and Liren Liu "Study of nonlinear phase error correction technique for synthetic aperture ladar", Proc. SPIE 7442, Optics and Photonics for Information Processing III, 744214 (1 September 2009); https://doi.org/10.1117/12.826002

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Fourier transforms

Heterodyning

Error analysis

LIDAR

Phase shifts

Image resolution

Range imaging

Show All Keywords

Keywords/Phrases

Search In:

Publication Years