Binary-Phase Spatial Light Filters for Mode-Selective Excitation of Multimode Fibers

Stępniak, Grzegorz; Maksymiuk, Lukasz; Siuzdak, J.

doi:10.1109/jlt.2011.2155621

Cited by 48 publications

(24 citation statements)

References 15 publications

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“…Despite extensive theoretical and simulation studies on the AST approach including this work, quite little experimental study on this topic has been reported so far, mainly due to the lack of good optical filter offering an engineered group delay or dispersion profile. Potential good candidates to achieve the particularly designed AST filter include customized fibre Bragg gratings [14,22,23], chromo-modal dispersion mechanism [24] with the aid of mode-selective excitation [25], and photonic crystal fibre (PCF) with precisely controlled chromatic dispersion profile [26].…”

Section: Discussionmentioning

confidence: 99%

Adaptive non-uniform photonic time stretch for blind RF signal detection with compressed time-bandwidth product

Mididoddi

Wang

2017

Optics Communications

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Photonic time stretch significantly extends the effective bandwidth of existing analog-to-digital convertors by slowing down the input high-speed RF signals. Non-uniform photonic time stretch further enables time bandwidth product reduction in RF signal detection by selectively stretching high-frequency features more. However, it requires the prior knowledge of spectral-temporal distribution of the input RF signal and has to reconfigure the time stretch filter for different RF input signals. Here we propose for the first time an adaptive non-uniform photonic time stretch method based on microwave photonics prestretching that achieves blind detection of high-speed RF signals with reduced time bandwidth product. Non-uniform photonic time stretch using both quadratic and cubic group delay response has been demonstrated and time bandwidth product compression ratios of 72% and 56% have been achieved respectively.

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Section: Discussionmentioning

confidence: 99%

Adaptive non-uniform photonic time stretch for blind RF signal detection with compressed time-bandwidth product

Mididoddi

Wang

2017

Optics Communications

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“…Figure 2( 21 and LP 02 modes) and their n eff measured by the prism coupling method is plotted in Fig. 3(a) for the wavelength range between 1515 nm and 1590 nm.…”

Section: Fabrication Of Broadband Mode Selective Couplersmentioning

confidence: 99%

“…In order to fully utilize the higher order modes (HOM) in FMF, devices are required to control the modes guided in the fiber including excitation, separation and controlled coupling of individual guided modes in a single strand of FMF [12,13]. In addition to some of the early works such as mode selective coupler [13][14][15][16][17] and long period grating [18,19], various techniques have been reported on the basis of holographic filter, phase plate, photonic lantern and integrated circuit [20][21][22][23][24]. We recently reported an all-fiber MDM based on cascaded mode selective couplers (MSC's) for a fiber that supports four spatial modes (LP 01 , LP 11 , LP 21 , and LP 02 ) [25].…”

Section: Introductionmentioning

confidence: 99%

Broadband mode division multiplexer using all-fiber mode selective couplers

et al. 2016

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We report an all-fiber mode division multiplexer formed with cascaded mode selective couplers with significantly broadened bandwidth potentially spanning S, C and L band. This was achieved by matching the effective refractive indices over a wide wavelength range for the few mode fiber and the single mode fiber used in the coupler. The multiplexer provides high coupling efficiency (>55% for the worst case) for the 4 spatial modes over the entire wavelength range of 1515-1590 nm. The all-fiber construction provides mechanical stability. Experimental results for the coupling efficiency and the mode extinction ratio for each spatial mode are presented along with the far field radiation patterns.

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“…[10][11][12] ]. Here the passive binary phase plate is not put directly in front of the fiber input facet but in the collimated laser beam between the laser and the first focusing lens M O 1 [see figure 4].…”

Section: Comparison To the Free Space Setupmentioning

confidence: 99%

Selective higher order fiber mode excitation using a monolithic setup of a phase plate at a fiber facet

et al. 2015

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Controlling the modal content coupled into an optical fiber can be desireable in many situations, e.g. for adjusting the sensitivity of the guided field distribution to external perturbations. 1For this purpose we used a monolithic setup of a phase plate at a fiber inpute facet to excite selectivly higher order modes, which theoretically can provide a mode purity of more than 99 %. We investigated the capabilities of this approach by complete modal decomposition of the fiber output signals, considering the achievable mode purity with respect to several possible imperfections of the setup. The experiments are compared with detailed numerical simulations and show a high agreement.Additionally a comparison with a well known setup with free space phase plates [2][3][4] was undertaken. This showed the monolithic setup to be energetically twice as efficient.

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Binary-Phase Spatial Light Filters for Mode-Selective Excitation of Multimode Fibers

Cited by 48 publications

References 15 publications

Adaptive non-uniform photonic time stretch for blind RF signal detection with compressed time-bandwidth product

Adaptive non-uniform photonic time stretch for blind RF signal detection with compressed time-bandwidth product

Broadband mode division multiplexer using all-fiber mode selective couplers

Selective higher order fiber mode excitation using a monolithic setup of a phase plate at a fiber facet

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