Frequency detuning analysis in multi-chirp range-selective digital holography with temporal heterodyning.

Applied optics Pub Date : 2025-09-20 DOI:10.1364/AO.571313
Cole Hammond, R Krishna Mohan, Wm Randall Babbitt
{"title":"Frequency detuning analysis in multi-chirp range-selective digital holography with temporal heterodyning.","authors":"Cole Hammond, R Krishna Mohan, Wm Randall Babbitt","doi":"10.1364/AO.571313","DOIUrl":null,"url":null,"abstract":"<p><p>Range-selective digital holography (RSDH) is an advanced imaging technique that combines digital holography with the range-selective capabilities of frequency-modulated continuous-wave (FMCW) chirped lidar. Temporal heterodyne FMCW range-selective digital holography (TH FMCW RSDH) further extends this method by incorporating phase-shifting techniques to enable on-axis holographic imaging. In standard implementations, maximum hologram strength is achieved when the local oscillator (LO) frequency shift is set by the target distance, assuming that the hologram integration and chirp duration are aligned. However, in systems where hologram integration spans multiple chirps, this alignment is no longer guaranteed, and the optimal LO frequency shift may deviate from the nominal value. This work develops a theoretical framework to analyze the effects of LO detuning on range resolution and hologram strength in TH FMCW RSDH under multi-chirp integration. The model is experimentally validated using a time-of-flight (ToF) camera to perform phase-shifting and integration. Our results demonstrate that maximum hologram strength can occur at LO frequency shifts that differ from the nominal range-dependent value. These findings provide valuable insights for optimizing the performance of both TH and non-TH FMCW RSDH systems in scenarios where hologram integration spans multiple chirps.</p>","PeriodicalId":101299,"journal":{"name":"Applied optics","volume":"64 27","pages":"8077-8087"},"PeriodicalIF":0.0000,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied optics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1364/AO.571313","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

Abstract

Range-selective digital holography (RSDH) is an advanced imaging technique that combines digital holography with the range-selective capabilities of frequency-modulated continuous-wave (FMCW) chirped lidar. Temporal heterodyne FMCW range-selective digital holography (TH FMCW RSDH) further extends this method by incorporating phase-shifting techniques to enable on-axis holographic imaging. In standard implementations, maximum hologram strength is achieved when the local oscillator (LO) frequency shift is set by the target distance, assuming that the hologram integration and chirp duration are aligned. However, in systems where hologram integration spans multiple chirps, this alignment is no longer guaranteed, and the optimal LO frequency shift may deviate from the nominal value. This work develops a theoretical framework to analyze the effects of LO detuning on range resolution and hologram strength in TH FMCW RSDH under multi-chirp integration. The model is experimentally validated using a time-of-flight (ToF) camera to perform phase-shifting and integration. Our results demonstrate that maximum hologram strength can occur at LO frequency shifts that differ from the nominal range-dependent value. These findings provide valuable insights for optimizing the performance of both TH and non-TH FMCW RSDH systems in scenarios where hologram integration spans multiple chirps.

时间外差的多啁啾范围选择数字全息的频率失谐分析。
距离选择数字全息(RSDH)是一种先进的成像技术,它将数字全息技术与调频连续波(FMCW)啁啾激光雷达的距离选择能力相结合。时间外差FMCW距离选择性数字全息(TH FMCW RSDH)通过结合相移技术进一步扩展了该方法,以实现轴上全息成像。在标准实现中,假设全息图积分和啁啾持续时间对齐,当本振(LO)频移由目标距离设置时,可以实现最大的全息图强度。然而,在全息图集成跨越多个啁啾的系统中,这种对准不再得到保证,并且最佳的本LO频移可能偏离标称值。本工作建立了一个理论框架,分析了在多啁啾集成下,本LO失谐对TH FMCW RSDH距离分辨率和全息图强度的影响。利用飞行时间(ToF)相机对该模型进行了相移和积分的实验验证。我们的研究结果表明,最大的全息图强度可以发生在与标称范围相关值不同的本征频移处。这些发现为在全息图集成跨越多个啁啾的情况下优化TH和非TH FMCW RSDH系统的性能提供了有价值的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信