Cost-effective single-etched TM-mode SOI grating couplers for broadband perfectly vertical coupling

2014 ◽  
Author(s):  
G. Dabos ◽  
D. Kalavrouziotis ◽  
J. Bolten ◽  
A. Prinzen ◽  
N. Pleros ◽  
...  
Keyword(s):  
Cost Effective ◽  
Grating Couplers ◽  
Vertical Coupling ◽  
Tm Mode

scholarly journals Efficiency Enhanced Grating Coupler for Perfectly Vertical Fiber-to-Chip Coupling

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2681 ◽  
Author(s):  
Zan Zhang ◽  
Xiaotao Shan ◽  
Beiju Huang ◽  
Zanyun Zhang ◽  
Chuantong Cheng ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
Coupling Efficiency ◽  
Optical Power ◽  
Wide Band ◽  
Cost Effective ◽  
Grating Coupler ◽  
Wavelength Division ◽  
Si3n4 Layer ◽  
Vertical Coupling ◽  
193 Nm

In this work, a bidirectional grating coupler for perfectly vertical coupling is proposed. The coupling efficiency is enhanced using a silicon nitride (Si3N4) layer above a uniform grating. In the presence of Si3N4 layer, the back-reflected optical power into the fiber is diminished and coupling into the waveguide is increased. Genetic algorithm (GA) is used to optimize the grating and Si3N4 layer simultaneously. The optimal design obtained from GA shows that the average in-plane coupling efficiency is enhanced from about 57.5% (−2.5 dB) to 68.5% (−1.65 dB), meanwhile the average back-reflection in the C band is reduced from 17.6% (−7.5 dB) to 7.4% (−11.3 dB). With the help of a backside metal mirror, the average coupling efficiency and peak coupling efficiency are further increased to 87% (−0.6 dB) and 89.4% (−0.49 dB). The minimum feature size of the designed device is 266 nm, which makes our design easy to fabricate through 193 nm deep-UV lithography and lowers the fabrication cost. In addition, the coupler proposed here shows a wide-band character with a 1-dB bandwidth of 64 nm and 3-dB bandwidth of 96 nm. Such a grating coupler design can provide an efficient and cost-effective solution for vertical fiber-to-chip optical coupling of a Wavelength Division Multiplexing (WDM) application.

scholarly journals Cost-effective CMOS-compatible grating couplers with backside metal mirror and 69% coupling efficiency

2012 ◽  
Vol 20 (26) ◽  
pp. B238 ◽  
Author(s):  
Wissem Sfar Zaoui ◽  
María Félix Rosa ◽  
Wolfgang Vogel ◽  
Manfred Berroth ◽  
Jörg Butschke ◽  
...  
Keyword(s):  
Coupling Efficiency ◽  
Cost Effective ◽  
Grating Couplers ◽  
Cmos Compatible

scholarly journals Silicon nitride ring resonator biosensors operated at 1310 nm wavelengths via TM-mode grating couplers

2021 ◽  
Author(s):  
Lucía Castelló-Pedrero ◽  
María I. Gómez-Gómez ◽  
Jaime García-Rupérez ◽  
Amadeu Griol ◽  
Alejandro Martínez
Keyword(s):  
Silicon Nitride ◽  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Bovine Serum ◽  
Transverse Magnetic ◽  
Ring Resonators ◽  
Grating Couplers ◽  
Tm Mode ◽  
Highly Sensitive ◽  
Integrated Device

Abstract In this work, we demonstrate a full photonic integrated device for performing highly-sensitive biosensing using silicon nitride ring resonators propagating transverse-magnetic modes at wavelengths around 1310 nm. The device includes fully-etched grating couplers as interfaces with external optical fibres. Sensing experiments are performed in a microfluidic environment using bovine serum albumin and anti-bovine serum albumin as biological agents. In comparison with other photonic platforms based on ring resonators propagating transverse-electric modes, our device shows a better detection performance though the efficiency of the grating couplers can be further improved.

Progress on Asymmetrical Grating Couplers for Vertical Coupling

2021 ◽  
Vol 58 (5) ◽  
pp. 0500004-50000424
Author(s):  
田苗 Tian Miao ◽  
瞿敏妮 Qu Minni ◽  
乌李瑛 Wu Liying ◽  
程秀兰 Cheng Xiulan
Keyword(s):  
Grating Couplers ◽  
Vertical Coupling
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