Dammann-grating-based passive phase locking by an all-optical feedback loop

Yang, Yifeng; Liu, Houkang; Zheng, Yi; Hu, Man; Liu, Chi; Qi, Yunfeng; He, Bing; Zhou, Jun; Wei, Yunrong; Lou, Qihong

doi:10.1364/ol.39.000708

Cited by 16 publications

(6 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This significantly augmented the theoretical foundation and expanded the application domain of Dammann gratings. Presently, DGs find ubiquitous utility in diverse fields such as optical communication [5][6], monocular/stereo vision 3D measurement [7][8], and structured light projection [9][10].…”

Section: Introductionmentioning

confidence: 99%

Polarization Multiplexing Dammann Grating Based on All-Dielectric Metasurface

Wu,

Huang,

et al. 2024

IEEE Photonics J.

View full text Add to dashboard Cite

Dammann gratings (DG) have become a powerful tool for generating multi-level spectral points in equal-intensity speckle arrays through binary phase variation. Conventional DGs are limited to regular dot arrays, such as squares and circular rings. The emergence of metasurface-based coding technology opens new avenues for ultra-thin, compact, and miniaturized DGs. In this study, we present a comprehensive exploration of polarization multiplexing DGs employing an alldielectric metasurface. Our work introduces a novel twodimensional (2D) DG optimization algorithm tailored for specific desired array patterns, including non-centrally symmetric arrays and arrays maximizing specific desired orders. This innovation significantly broadens the applications of DGs in irregular arrays.Additionally, in contrast to the numerous dimension sizes generated by conventional Gerchberg-Saxton (GS) algorithms, the proposed method employs a silicon nanorod array with only three distinct sizes. This streamlined approach greatly enhances precision control in nanofabrication and facilitates large-scale industrial replication. Furthermore, the incorporation of polarization multiplexing in DGs enhances their versatility, amplifying both channel capacity and spectrum utilization, and allowing for the secure encoding of private information through polarization states. The utilization of orthogonal polarization states becomes crucial for information reuse and hiding, where independent coding information is applied to orthogonally polarized light, enabling applications such as secure information reuse and hiding. Simultaneously, our method maintains exemplary performance metrics, boasting efficiencies and uniformities of 75% and 77%, respectively. Notably, our approach achieves effective suppression of the 0 th diffraction order intensity, a crucial advancement with substantial implications for practical metasurface optics applications. The proposed method holds great promise across diverse applications, including structured light projection, optical communication, and 3D imaging, paving the way for DG integration into various scientific and technological domains.

show abstract

Section: Introductionmentioning

confidence: 99%

Polarization Multiplexing Dammann Grating Based on All-Dielectric Metasurface

Wu,

Huang,

et al. 2024

IEEE Photonics J.

View full text Add to dashboard Cite

show abstract

“…The demand for high-brightness fiber amplifiers for application in scientific, aeronautic, astronautic and defense areas has created an interest in beam combining technology, which can be classified into two main categories: coherent beam combining and spectral beam combining [3][4][5][6]. In the case of coherent beam combining (CBC), several beams with identical wavelength are phase controlled in a sophisticated manner, and superposed in the far field to accomplish the brightness improvement [7][8][9][10][11][12]. For spectral beam combining (SBC), a dispersive element is used to merge multiple spectrally distinct lasers into a single diffraction-limited beam [13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Effective dispersion compensation of variable-linewidth fiber amplifier by single-multilayer dielectric grating

Zheng

Yang

Wang

et al. 2016

J. Opt.

Self Cite

View full text Add to dashboard Cite

We achieve effective dispersion compensation by employing a single-multilayer dielectric diffraction grating and a variable-linewidth fiber amplifier. Both theoretical and experimental studies on the diffracted beam quality have been performed. The experimental results show that when the linewidth reaches 0.41 nm the beam quality in the dispersive plane reduces dramatically from 5.4 for the first-time diffracted beam to 2.08 for the second-time diffracted beam. This dispersion compensation technology relaxes the requirement on the linewidth of the incident beam source, which is beneficial for high-brightness spectral beam combining.

show abstract

“…[22−24] By using Dammann grating in the alloptical feedback loop, an intracavity spatial filter can make the beamlets constructively interfere to produce a single-mode feedback signal, which can be recoupled into the array elements by the feedback fiber with high efficiency and stability. [25] In this Letter, we demonstrate passive phase locking of three nanosecond Yb-doped fiber amplifiers (YDFAs) with a Dammann grating intracavity spatial filter. The width of the combined pulses is 9.6 ns, and the pulse repetition frequency is 2.208 MHz.…”

mentioning

confidence: 99%

Passive Phase Locking of Three Nanosecond Fiber Amplifiers Using a Dammann Grating Spatial Filter

Yang¹,

Zheng²,

He³

et al. 2014

Chinese Phys. Lett.

Self Cite

View full text Add to dashboard Cite

A passive coherent beam combination of three nanosecond Yb-doped fiber amplifiers by an all-optical feedback loop is realized by a Dammann grating intracavity spatial filter. By using this diffractive-optics-based spatial filtering technique, three tile-aperture laser beams are phase-locked with a peak power of 1.02 kW. The width of the combined pulses is 9.6 ns, and the repetition frequency is 2.208 MHz. The visibility of the far-field interference pattern is up to 82.9%. The results show that this approach can scale to larger arrays and higher powers.

show abstract

Dammann-grating-based passive phase locking by an all-optical feedback loop

Cited by 16 publications

References 18 publications

Polarization Multiplexing Dammann Grating Based on All-Dielectric Metasurface

Polarization Multiplexing Dammann Grating Based on All-Dielectric Metasurface

Effective dispersion compensation of variable-linewidth fiber amplifier by single-multilayer dielectric grating

Passive Phase Locking of Three Nanosecond Fiber Amplifiers Using a Dammann Grating Spatial Filter

Contact Info

Product

Resources

About