Based on the transverse electric (TE)/transverse magnetic (TM) polarization diversity in plasmonic Bragg gratings, a compact TM-pass/TE-stop polarizer is theoretically proposed thin-film lithium niobate insulator (LNOI) platforms. By introducing large misalignment between metal gratings both sides of LNOI waveguide, we demonstrate with high extinction ratio 20 dB, low insertion loss 2.5 wide waveband from 1.48 to 1.62 μm, and size only 23 μm simulation.

A broadband and compact TE-pass/TM-stop polarizer is presented based on hybrid plasmonic grating (HPG) an x-cut Lithium-Niobate-on-isolator (LNOI) platform. By comprehensively analyzing the effects of metal width mode effective index, similarity, conversion, we demonstrate structure with a narrow layer. The simulation results indicate that length 9 μm achieves extinction ratio over 20 dB within wavelength range from 1470 nm to 1700 nm. insertion loss below 2.3 in C-band. Furthermore,...

A novel non-planar coding metasurface optimized by discrete particle swarm algorithm (DPSO) is proposed in terms of the property wideband radar cross-section (RCS) and diffuse scattering. The design consists two unit cells, "0" "1", which have a 180° ± 37° phase difference for interference cancellation. 10 dB monostatic RCS reduction frequency range from 6.4 to 29.6 GHz, its bandwidth ratio 4.62:1, under normal incidence polarizations. Compared planar surface, surface has greater with...

Radar warning receiver (RWR) plays a significant role in detecting weapon radar. The instantaneous frequency measurement (IFM) section with fast measuring response, large bandwidth, moderate accuracy, and sensitivity is important for an all-threat-covered RWR. In this IFM method, phase modulator (PM) combination differentiation structure employed to get rid of the DC drifting makes power response strict monotonous function input frequency. Therefore, unambiguous determination can be made...

We propose and demonstrate a new reconfigurable instantaneous frequency measurement (IFM) system based on dual-polarization dual-drive Mach-Zehnder modulator (DPol-DMZM). By simply adjusting the dc biases both arms of DPol-DMZM, upper lower bounds IFM range can be independently adjusted. Experiments have shown that bound is as low 2 GHz, up to 23 GHz. The resolution three bandwidths 5, 6.5, 8 GHz less than ±0.2 It noted proposed power dependent. To solve this problem, power-independent...

A novel emulator of laser Doppler frequency shift (DFS) for satellite communication based on microwave photonics technology is proposed and experimentally demonstrated. In order to overcome the bottleneck that optical signal with a wide offset from near zero can hardly be obtained using traditional electro-optic or acousto-optic shifting, first moved lower/higher fixed then shifted back higher/lower tunable frequency. The after cascaded shifting in opposite direction equivalent original DFS....

We proposed a compact and efficient polarization rotator (PR) based on an asymmetric hybrid plasmonics waveguide (HPW) the lithium-niobate-on-insulator (LNOI) platform. focus design of rotation angle balance between two modes. The presented device exhibits extinction ratio as high 59.58 dB insertion loss 1.44 with length only 13.7 μm. fabrication tolerances suitable process are also discussed to meet state-of-art technology.

A simple approach to estimating microwave Doppler frequency shift (DFS) based on a single dual-polarization quadrature phase keying (DP-QPSK) modulator is proposed and experimentally demonstrated. The scheme capable of both the value direction DFS simultaneously precisely owing introduction reference signal. In approach, transmitted signal (microwave carrier) are loaded upper branch DP-QPSK generate carrier suppression double-sideband signals, respectively, while echo lower perform...

We proposed a design of fundamental TM mode waveguide optical isolator using lithium niobate on insulator (LNOI) and deposited magneto-optical film. The adopts an asymmetric Mach-Zehnder interferometer (MZI) structure composed two 1 × 2 MMIs, non-reciprocal reciprocal waveguides. used three methods to calculate the phase shift (NRPS) (LN)/ Ce: YIG composite got similar results. device shows about 51.98 nm 30 dB isolation bandwidth 1.20 simulated insertion loss at wavelength 1550 nm....

We propose and demonstrate an integrated microwave photonic sideband selector based on the thin-film lithium niobate (TFLN) platform by integrating electro-optic Mach–Zehnder modulator (MZM) a thermo-optic tunable flat-top microring filter. The has two functions: modulation of wideband RF signal selection. supports processing signals up to 40 GHz, with undesired sidebands effectively suppressed more than 25 dB. demonstrated device shows great potential for TFLN technology in applications,...

This paper reports a transceiver module with high polarization extinction ratio (PER) for the polarization-maintaining interferometric fiber optic gyroscope (PM-IFOG). utilizes graded-index lens featuring slanted face coated multilayer film, enabling simultaneous collimation and beam splitting. Configurations of splitter corresponding are simulated designed using ray matrix method physical optical propagation. The loss is about 3.77 dB, PER exceeds 25 dB. IFOG prototype implemented by...

A photonic instantaneous microwave frequency measurement scheme based on frequency-to-time mapping and channelization is proposed. An unknown signal divided into four channels mixed with a broadband linear frequency-modulated signal. The information converted to the time domain, range has been expanded due channelization. simulation system constructed demonstrate effectiveness of proposed method. proof-of-concept experimental result shows that errors can be kept in 20 MHz 10 resolution, 1 GHz 39 GHz.

The electrical mixer is limited by operation bandwidth and parallel processing capacity, suffering from increasingly serious electro-magnetic interference. By introducing photonic properties, microwave technology has many advantages compared to the traditional technology, such as low loss, large bandwidth, high anti-electromagnetic interference so on. In this work, a Stimulated Brillouin Scattering (SBS) based with image rejection capacity proposed. Due wavelength-selectivity wideband...

We demonstrate a three-active-section directly modulated laser to expand the modulation bandwidth. The bandwidth reaches 48 GHz through photon-photon resonance (PPR) effect generated by active optical feedback and detuned loading effect.

In the tumor microenvironment (TME), transforming growth factor-β (TGF-β) and programmed cell death receptor 1 (PD-1)/programmed ligand (PD-L1) signaling axes are complementary, nonredundant immunosuppressive pathways. Studies have revealed that active TGF-β is mainly released from glycoprotein A repetitions predominant (GARP)-TGF-β complex on surface of activated regulatory T cells (Tregs), B cells, natural killer (NK) cells. The currently available antibodies or fusion proteins target...

An all-pass racetrack-resonator-Bragg gratings (APRR-BG) on thin-film lithium niobate insulator (LNOI) based coupling resonant system is proposed to generate tunable electromagnetically induced transparency (EIT)-like transmission. The structure a normal racetrack-resonator with two Bragg inscribed within the straight waveguides, which introduces different optical pathways in essence, inducing EIT-like spectrum as result. We investigate linewidth, and tunability of spectrum, manufacturing...

A differentiator-based photonic approach for the instantaneous microwave frequency measurement (IFM) using a phase modulator and an optical Gaussian filter is proposed experimentally demonstrated. with high resolution achieved by monotonous frequency-to-power mapping obtained differential operation in domain. proof-of-concept experiment has been performed, which error less than ±0.1 GHz over range 0.1-10 input power of 0 dBm The IFM system still ±0.24 GHz, even though signal decreases to -30...

For the urgent demand of broadband, high efficient, parallel processing and anti-jamming capability in field ultra-wideband measurement control communication. This paper puts forward a kind channelized receive technology based on microwave photonic technology. The coherent optical comb generation module generates signal local oscillator comb. with repetition frequency is obtained by using cascade modulator nonlinear technique. In order to satisfy 10 tooth designed for system, FSR greater...