Journal of Nonlinear Optical Physics & Materials

In the all-optical domain, the reflective semiconductor optical amplifier (RSOA) creates due attention in the research community because the RSOA has high gain, low-power consumption, high-speed signal processing ability as well as low noise performance. In this work, we have proposed dibit-based OR and NOR gates using RSOA. Dibit-based logic is utilized in this design to get the reduced bit-error problems and high degree of parallelism. To verify the functionality of the aforementioned designs, we have used MATLAB software and also the quality factor (Q), extinction ratio (ER), contrast ratio (CR), and bit-error-rate (BER) have been calculated.

This study offers and explores an ultra-high efficiency up-converter to convert three mid-infrared frequency bands to three visible frequency bands. Our purpose is to explore frequency analysis in the up-conversion process. In our suggested band-to-band up-conversion device, the time-varying mid-infrared light signals are converted into time-varying electrical currents; these time-varying electrical currents are amplified by the transistor. Finally, these amplified currents produce time-varying visible light currents and power through the usage of organic light-emitting diodes (LEDs). This up-conversion device includes: (1) Doped nanocrystalline layers of PbSe, CdSe, and CdTe as photodetectors to detect three different central frequencies of 100, 70, and 56THz, (2) the NPN BJT as a current amplifier and output quantum efficiency (QE) improvement, (3) blue, green, red organic LEDs for producing visible light currents and powers; these OLEDs operate at central frequencies of 667, 545, and 484 THz, respectively. In this investigation, narrow-band mid-infrared light is converted into broadband visible light considering conventional LEDs. The mid-infrared input optical signal with a bandwidth of 0.004, 0.0006, and 0.004 THz is converted to visible optical bandwidth of 0.425, 0.52, and 0.37 THz, respectively. The output QE of the proposed structure for the frequency of 100, 70, and 56 THz is $24\times 10^3$%, $56\times 10^3$%, and $16\times 10^3$%, respectively. The results indicate more excellent QE than other research. Also, it is the first study about the frequency response of the up-conversion device to convert narrowband mid-infrared lights into broadband visible lights.

In this paper, we examine generalized nonlinear Schrödinger equation (GNLSE) for lump, breather lump wave, rogue wave, periodic cross kink wave, lump with one kink, lump with two-kink, interaction between lump periodic and kink wave, periodic cross lump wave, periodic wave and multi-wave. Ansatz transformations will be used to study homoclinic breather, kink cross rational, M-shaped rational, periodic cross rational, M-shaped rational with one kink, M-shaped rational with two-kink, M-shaped interaction with rogue and kink and M-shaped interaction with periodic and kink. We will also study the stability of the obtained solutions. Additionally, we present three-dimensional, two-dimensional, contour, and stream plot illustrations for our graphs.

In this paper, we construct optical spherical recursion flux for optical spherical $𝕊fs$-magnetic curve with optical normalized microscale by sonic magnetic crystal. Also, we design optical spherical magnetic normalized density of optical spherical $𝕊fs$-magnetic curve. Then, we illustrate new version of optical spherical recursional flux of optical spherical $𝕊fs$-magnetic curve. Moreover, we characterize total magnetical normalized density with optical ferromagnetic model for optical spherical $𝕊fs$-magnetic curve. The obtained spherical recursion flux and optical graphical representations visualize geometry of sonic magnetic crystal media.

The nonlinear refractive index of large area monolayer molybdenum disulfide (MoS₂) thin film at the 1,550nm wavelength band is determined using time-resolved z-scan technique. MoS₂ exhibits positive nonlinear phase shift with a large nonlinear refractive index, $n_2$ value of $1.40\times 10^{-13}{\mathrm{\text{m}}}^2{\mathrm{\text{W}}}^{-1}$. The obtained value is similar to the $n_2$ value of monolayer MoS₂ film measured at 2.0$\mu$m, and is approximately five and seven orders of magnitude larger than silicon and common bulk dielectrics. The large $n_2$ indicates that MoS₂ can be used as nonlinear refractive 2D material for photonics applications operating in the 1,550nm optical telecommunications wavelength band.

In recent times, there has been enormous growth in internet-based applications such as online entertainment platforms, video conferencing and voice over internet protocol (VoIP) applications which might be the trend in future. In order to support such bandwidth-hungry applications, the speed of the network should be enhanced. Increasing the infrastructure of the network requires heavy investment. Another alternative to increase the capacity of the network is to use dense wavelength division multiplexing (DWDM) which also results in increased costs as the lasers and other equipment needed for generation of wavelengths are required. In this work, an alternative cost effective technique is used to create a DWDM scenario using optical flat comb source (OFCS) by combining amplitude modulator (AM) and single drive mach zehnder modulator (SD-MZM). The spectral lines generated using this procedure can be used in Passive Optical Network (PON) as input sources. In this paper, 51 flat spectral lines are generated and transported over a distance of 100 km which are also capable of supporting a data rate of greater than 10 Gbps in a single spectral line.

FTIR, FT-Raman and NMR are studied to explore the functional groups, the vibration modes and its coupling interactions for the grown single crystal piperazine-1,4-diium bis (4-aminobenzenesulfonate) (PABS). The cut-off wavelength at 303 nm of UV–Visible spectrum exhibits great transmittance over the entire visible spectrum. Photoluminescence spectral study revealed the electron excitation notably in blue emission range. The range of susceptibility and nonlinear refractive index was obtained from second and third harmonic generations of PABS crystals. At various temperatures, the thermal stability of the crystal and the crystal dielectric characteristics had been studied in relation to frequency. The hardness of the crystal was obtained by microhardness measurements.

A plasmonic nanosensor is proposed and investigated its sensitivity using the optical properties of plasmonic nanoparticles. To this end, we first consider the nanosensor consisting of bowtie nanoparticles. Then, the nanosensor performance is examined under different factors such as the refractive index of the background environment, the height, and length of the nanoparticles. The proposed bowtie nanoparticles, in this work, are made of gold. The boundary element method is used to simulate the nanosensor. The extinction cross-section is computed in terms of wavelength and the effect of various factors on the resonance wavelength of localized surface plasmon is investigated. It is shown that the nanosensor investigated in this research has a high sensitivity to the changes in the refractive index of the studied sample. The sensitivity of the nanosensor is obtained as 650nm/RIIU. In addition, the required spectral range can be arbitrarily adjusted by the type of nanoparticles.