Low-spatial-coherence high-radiance broadband fiber source for speckle free imaging

被引：62

作者：

Redding, Brandon ^{[1
]}

Ahmadi, Peyman ^{[2
]}

Mokan, Vadim ^{[2
]}

Seifert, Martin ^{[2
]}

Choma, Michael A. ^{[1
,3
,4
,5
]}

Cao, Hui ^{[1
]}

机构：

[1] Yale Univ, Dept Appl Phys, New Haven, CT 06520 USA

[2] Nufern, East Granby, CT 06026 USA

[3] Yale Univ, Sch Med, Dept Diagnost Radiol, New Haven, CT 06520 USA

[4] Yale Univ, Sch Med, Dept Pediat, New Haven, CT 06520 USA

[5] Yale Univ, Dept Biomed Engn, New Haven, CT 06520 USA

来源：

OPTICS LETTERS | 2015年 / 40卷 / 20期

基金：

美国国家卫生研究院;

关键词：

LASER; TOMOGRAPHY; AREA;

D O I：

10.1364/OL.40.004607

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We design and demonstrate a fiber-based amplified spontaneous emission (ASE) source with low spatial coherence, low temporal coherence, and high power per mode. ASE is produced by optically pumping a large gain core multimode fiber while minimizing optical feedback to avoid lasing. The fiber ASE source provides 270 mW of continuous wave emission, centered at lambda = 1055 nm, with a full width at half-maximum bandwidth of 74 nm. The emission is distributed among as many as similar to 70 spatial modes, enabling efficient speckle suppression when combined with spectral compounding. Finally, we demonstrate speckle-free full-field imaging using the fiber ASE source. The fiber ASE source provides a unique combination of high power per mode with both low spatial and low temporal coherence, making it an ideal source for full-field imaging and ranging applications. (C) 2015 Optical Society of America

引用

页码：4607 / 4610

页数：4

共 29 条

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