1.5-μm InGaAsP-InP multigain-levered-MQW-DFB-LD with high-efficiency and large-bandwidth FM response

1995 ◽  
Vol 1 (2) ◽  
pp. 516-522
Author(s):  
Jong-In Shim ◽  
H. Olesen ◽  
H. Yamazaki ◽  
M. Yamaguchi ◽  
M. Kitamura
Keyword(s):  
High Efficiency ◽  
Large Bandwidth

High efficiency, small size and large bandwidth vertical interlayer waveguide coupler

2021 ◽  
Author(s):  
Shaoyang Li ◽  
Liangliang Wang ◽  
Dan Wu ◽  
Jin You ◽  
Yue Wang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Waveguide Coupler ◽  
Large Bandwidth

Stack-based grating for wideband polarization splitter in terahertz

2021 ◽  
Author(s):  
Zefan Lin ◽  
Bo Wang ◽  
Chen Fu
Keyword(s):  
Communication Systems ◽  
Simulated Annealing Algorithm ◽  
High Efficiency ◽  
Incident Angle ◽  
Reference Value ◽  
Transverse Magnetic ◽  
Large Bandwidth ◽  
Rigorous Coupled Wave Analysis ◽  
Terahertz Band ◽  
Rigorous Coupled Wave

Abstract A novel wideband terahertz polarization beam splitter with special diffraction orders working at terahertz band is described in this paper. The polarizer can achieve high diffraction efficiency and uniformity in the 2.50 - 2.56 THz band. Based on rigorous coupled-wave analysis (RCWA) and simulated annealing algorithm, we proposed an efficient algorithm to optimize the polarizer. After calculations, 98.45% single-port high-efficiency reflection for transverse electric (TE) polarization and 42.33%/42.57% highly uniform dual-port beam splitting for transverse magnetic (TM) polarization were finally obtained. In addition, through RCWA and simplified modal method, the electromagnetic field distributions of TE and TM polarizations are shown visually and described quantitatively. Moreover, the results displayed in Sec. 3 prove that the grating possesses the characteristics of relatively large bandwidth and insensitivity to the incident angle. Therefore, the novel scheme in this paper has great reference value for the research of terahertz modulation devices and the integration of terahertz communication systems.

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