Transmissive Fiber Bragg Grating-Based Delay Line Interferometer for RZ-OOK to NRZ-OOK Format Conversion

Liu, Xin; Xu, Zuowei; Preciado, Miguel A.; Gbadebo, Adenowo; Zhang, Lin; Xiong, Jiabi; Yu, Yu; Shu, Xuewen

doi:10.1109/access.2019.2938021

Cited by 4 publications

(3 citation statements)

References 24 publications

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“…A number of devices based on PM-FBG have been designed and demonstrated through simulation and experiments, such as virtual Gires-Tournois etalons [16], pulse shaper [17], and photonic temporal differentiator [18]. In particular, PM-FBGs with a length of 9 cm applied to delay line interferometer [19] and format conversion [20] have been fabricated using a UV laser direct-writing system, where the gratings are created pitch by pitch, and the coupling coefficient profile and the varied period are realized by controlling the on/off of an acoustic optical modulator and moving the phase mask/fiber.…”

Section: Introductionmentioning

confidence: 99%

Arbitrary-Order Photonic Hilbert Transformers Based on Phase-Modulated Fiber Bragg Gratings in Transmission

Liu

Shu

et al. 2021

Photonics

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Photonic Hilbert transformers are fundamental components for optical computing and signal processing. Here, for the first time we propose all-optical arbitrary-order Hilbert transformers using phase-modulated fiber Bragg gratings (PM-FBGs) in transmission to our best knowledge. The PM-FBG is a kind of fiber grating, whose coupling strength remains almost uniform and period varies along the fiber length. For demonstration, we have designed and numerically simulated 0.5th-order, first-order, and 1.5th-order photonic Hilbert transformers, respectively. The profiles of those PM-FBGs are obtained employing quasi-Newton optimization algorithm. Simulation results show that the designed three Hilbert transformers are all in good agreement with the ideal results in bandwidths up to 500 GHz and can tolerate a large range of input pulse width.

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Section: Introductionmentioning

confidence: 99%

Arbitrary-Order Photonic Hilbert Transformers Based on Phase-Modulated Fiber Bragg Gratings in Transmission

Liu

Shu

et al. 2021

Photonics

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“…The optical modulation characteristic of a transmissive optical fibre sensor was implemented in designing and fabricating a transmissive phase‐modulated fibre Bragg grating for return‐to‐zero on‐off keying (RZ‐OOK) to non‐return‐to‐zero (NRZ) OOK conversion [27]. A transmissive optical fibre sensor based on localised surface plasmon resonance was designed and fabricated using gold nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of transmissive modified cladding optical fibre sensors

Jahromi

2021

IET Optoelectronics

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Optical fibre sensors with modified cladding have been a topic of great interest for decades. Thanks to the new techniques of fabricating nanostructured films, this interest has been renewed. Although there have been many increases in published experimental research, no comprehensive theoretical formulation of the structure is reported in the literature. In this study, a general theory for transmissive modified cladding optical fibre sensors is presented. The model is formulated based on the electromagnetic fields and optical power in the core and cladding of a step-index fibre. The model considers various parameters, especially the radius of the optical fibre core, modified cladding refractive index, and light wavelength. The sensitivity, response, and optical transmission of the sensor are analysed as a function of the parameters. The analyses show that optical transmission reduces dramatically when the modified cladding refractive index approaches the refractive index of the core of the fibre and results in higher sensor response and sensitivity. Increasing the core radius of the fibre will result in lower sensor response with higher sensitivity. Both parameters will increase for a light with a larger wavelength. The results are in good agreement with experimental evidence.

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“…Recently, visual light communication (VLC) (Che et al 2018;Gao et al 2019) is gaining interest to provide high-speed communications with the sensors (Verma et al 2019) and end devices. To enhance the security of communication and provide multiple access over the OFC, Li-Fi (Wang and Haas 2015), and VLC optical code division multiple access (OCDMA) techniques are used, it uses On-Off keying (OOK) (Liu et al 2019) to represent binary data, 1 is represented by an optical (light on) pulse and 0 is represented by no light (off) pulse. The OCDMA system requires optical orthogonal codes (OOCs).…”

Section: Introductionmentioning

confidence: 99%

Optical orthogonal code generation scheme and grouping of codes for optical CDMA systems

Chauhan¹,

Kumar

Gautam

2020

Int J Syst Assur Eng Manag

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To exploit the attractive features of CDMA systems and the tremendous bandwidth provided by optical communication such as fiber, VLC, and Li-FI channel, a new system is emerging and is known as optical code division multiple access. These systems require optical orthogonal codes (OOCs). This paper presents an algorithm to design OOCs and determines the auto-correlation (k a ) and cross-correlation (k c ) constrains of codes. The grouping of these OOCs for desired k a and k c is done using a low complexity bipartite method. Design of codes, groups, and simulation for performance analysis in terms of multiple access interference is done using MATLAB programming. The bipartite scheme for grouping finds all possible groups and it reduced the time of computation. The memory requirement of the scheme is also reduced together with computational complexity.

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Transmissive Fiber Bragg Grating-Based Delay Line Interferometer for RZ-OOK to NRZ-OOK Format Conversion

Cited by 4 publications

References 24 publications

Arbitrary-Order Photonic Hilbert Transformers Based on Phase-Modulated Fiber Bragg Gratings in Transmission

Arbitrary-Order Photonic Hilbert Transformers Based on Phase-Modulated Fiber Bragg Gratings in Transmission

Performance analysis of transmissive modified cladding optical fibre sensors

Optical orthogonal code generation scheme and grouping of codes for optical CDMA systems

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