Design of a Compact Polarization Splitter by Using Identical Coupled Silicon Nanowires

Soudi, Sasan; Rahman, B. M. A.

doi:10.1109/jlt.2016.2577341

Cited by 10 publications

(6 citation statements)

References 34 publications

(44 reference statements)

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“…Polarization beam splitter (PBS) is widely used to mitigate the polarization randomness problem in photonics systems by controlling the polarization state, thus, ensuring proper functioning [16][17][18][19][20]. PBS has been extensively used in sensor applications, such as polarization navigation sensor [21], photoacoustic remote sensing microscopy [22], distributed vibration sensor [23], magnetic field sensor [24], and fiber-optic gyroscope [25].…”

Section: Introductionmentioning

confidence: 99%

Polarization Beam Splitter Based on Si3N4/SiO2 Horizontal Slot Waveguides for On-Chip High-Power Applications

Fang

Bao

Wang

et al. 2020

Sensors

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In this paper, we propose an Si3N4/SiO2 horizontal-slot-waveguide-based polarization beam splitter (PBS) with low nonlinearity for on-chip high-power systems. The coupling length ratio between the quasi-TE and quasi-TM modes (LTE/LTM) was optimized to 2 for an efficient polarization splitting. For the single-slot design, the coupling length of the PBS was 281.5 μm, while the extinction ratios (ER) of the quasi-TM and quasi-TE modes were 23.9 dB and 20.8 dB, respectively. Compared to PBS based on the Si3N4 strip waveguide, the coupling length became 22.6% shorter. The proposed PBSs also had a relatively good fabrication tolerance for an ER of >20 dB. For the multi-slot design, the coupling length of the PBS was 290.3 μm, while the corresponding ER of the two polarizations were 24.0 dB and 21.0 dB, respectively. Furthermore, we investigated the tradeoff between the ER and coupling length for the optimized PBSs with single slot or multiple slots.

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Section: Introductionmentioning

confidence: 99%

Polarization Beam Splitter Based on Si3N4/SiO2 Horizontal Slot Waveguides for On-Chip High-Power Applications

Fang

Bao

Wang

et al. 2020

Sensors

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“…Directional couplers perform optical power exchange between usually two closely lying waveguides via the access of this evanescent effect, sensitive to the wavelength and polarization because of the dispersive nature of such mode interference couplers. They found many applications in, e.g., wavelength multiplexers/demultiplexers and polarization splitters [1][2][3]. On the other hand, the study of waveguide couplers working with broad spectral bandwidth has been in demand for important applications in especially optical communication and networking systems (for such as power or mode division, exchange, or switch [4][5][6]).…”

Section: Introductionmentioning

confidence: 99%

“…LiNbO 3 , renowned as "the silicon of photonics", has been long a popular (and perhaps the most important) material for building various integrated optical circuits/devices (reviews of the recent development in LiNbO 3 photonics can be found in [15][16][17]) because of its versatility derived from its excellent electro-optic (EO), acousto-optic, nonlinear-optic (NLO), and piezoelectric properties with wide optical transparent range (~0.4-5 μm) [18]. It will thus be interesting and desirable to develop a broadband polarization splitter in LiNbO 3 .…”

Section: Introductionmentioning

confidence: 99%

Broadband on-chip polarization mode splitters in lithium niobate integrated adiabatic couplers

et al. 2019

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We report, to the best of our knowledge, the first broadband polarization mode splitter (PMS) based on the adiabatic light passage mechanism in the lithium niobate (LiNbO 3 ) waveguide platform. A broad bandwidth of ~140 nm spanning telecom S, C, and L bands at polarization-extinction ratios (PER) of >20 dB and >18 dB for the TE and TM polarization modes, respectively, is found in a five-waveguide adiabatic coupler scheme whose structure is optimized by an adiabaticity engineering process in titanium-diffused LiNbO 3 waveguides. When the five-waveguide PMS is integrated with a three-waveguide "shortcut to adiabaticity" structure, we realize a broadband, high splitting-ratio (η c ) mode splitter for spatial separation of TE-(H-) polarized pump (700-850 nm for η c >99%), TM-(V-) polarized signal (1510-1630 nm for η c >97%), and TE-(H-) polarized idler (1480-1650 nm for η c >97%) modes. Such a unique integrated-optical device is of potential for facilitating the onchip implementation of a pump-filtered, broadband tunable entangled quantum-state generator.

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“…Mode-division multiplexing (MDM) has been shown to be more suitable for photonic integrated circuits (PIC) [3,4]. However, power transfer between the two orthogonal modes may occur in MDM systems, which is a major problem in communications and sensing systems [5]. Accordingly, there is a serious need for polarization handling devices, which include polarization beam splitters, polarization rotators, and polarizers.…”

Section: Introductionmentioning

confidence: 99%

Si-core photonic crystal fiber transverse-electric pass polarizer

2018

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Photonic crystal fibers (PCFs) have been extensively used in literature for designing polarization handling devices. Further, the Si material has advantages in terms of low loss transmission with a high refractive index. In this paper, a novel design of transverse-electric (TE) pass polarizer based on Si-core photonic crystal fiber (SC-PCF) is reported and studied using full vectorial finite element method. The suggested PCF has a SiO 2 cladding background and is selectively filled with gold nanorods. Further, an elliptical Si-core is used to increase the birefringence between the two polarizing modes. Therefore, the surface plasmon modes around the gold nanorods are highly coupled with the quasi-transverse-magnetic (TM) core modes while no coupling occurs with the quasi-TE core mode. Consequently, high and low confinement losses are achieved for the quasi-TM and quasi-TE core modes, respectively. Accordingly, a TE-pass polarizer is realized with an insertion loss of −0.000108 dB. Additionally, a good extinction ratio of −13.18 dB is obtained at a short device length of 29 μm.

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Design of a Compact Polarization Splitter by Using Identical Coupled Silicon Nanowires

Abstract: This is the accepted version of the paper.This version of the publication may differ from the final published version. Permanent

Cited by 10 publications

References 34 publications

Polarization Beam Splitter Based on Si3N4/SiO2 Horizontal Slot Waveguides for On-Chip High-Power Applications

Polarization Beam Splitter Based on Si3N4/SiO2 Horizontal Slot Waveguides for On-Chip High-Power Applications

Broadband on-chip polarization mode splitters in lithium niobate integrated adiabatic couplers

Si-core photonic crystal fiber transverse-electric pass polarizer

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