TY - GEN
T1 - High-responsivity 100GHz waveguide UTC photodetector
AU - Umezawa, T.
AU - Akahane, K.
AU - Matsumoto, A.
AU - Kanno, A.
AU - Yamamoto, N.
AU - Kawanishi, T.
N1 - Publisher Copyright:
© 2017 COPYRIGHT SPIE.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017
Y1 - 2017
N2 - We present a double cladding, high-mesa-type waveguide UTC photodetector with an improved the responsivity. In this device structure, an InGaAs thin core layer was sandwiched by p-InP/InGaAsP and n-InP/InGaAsP cladding layers, including a UTC structure, in order to obtain a good optical coupling between the waveguide and the fiber. By comparing the resulting mode field with that obtained with a single cladding layer structure, we confirmed that the vertical mode field was enlarged. Without a spot size converter, the measured responsivity was as high as 0.6 A/W at 1550 nm, which suggests a responsivity three times higher than that of back-illuminated structures, and higher responsivity than that of previous reports. A high frequency performance (f3dB = 100 GHz) was also measured. The device structure, including the layer, doping level conditions, and optical fiber coupling results are discussed, and its performance is characterized in detail.
AB - We present a double cladding, high-mesa-type waveguide UTC photodetector with an improved the responsivity. In this device structure, an InGaAs thin core layer was sandwiched by p-InP/InGaAsP and n-InP/InGaAsP cladding layers, including a UTC structure, in order to obtain a good optical coupling between the waveguide and the fiber. By comparing the resulting mode field with that obtained with a single cladding layer structure, we confirmed that the vertical mode field was enlarged. Without a spot size converter, the measured responsivity was as high as 0.6 A/W at 1550 nm, which suggests a responsivity three times higher than that of back-illuminated structures, and higher responsivity than that of previous reports. A high frequency performance (f3dB = 100 GHz) was also measured. The device structure, including the layer, doping level conditions, and optical fiber coupling results are discussed, and its performance is characterized in detail.
KW - Double clad
KW - Frequency response
KW - Responsivity
KW - Waveguide-photodetector
UR - http://www.scopus.com/inward/record.url?scp=85016245919&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85016245919&partnerID=8YFLogxK
U2 - 10.1117/12.2250246
DO - 10.1117/12.2250246
M3 - Conference contribution
AN - SCOPUS:85016245919
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Broadband Access Communication Technologies XI
A2 - Mikroulis, Spiros
A2 - Dingel, Benjamin B.
A2 - Tsukamoto, Katsutoshi
PB - SPIE
T2 - Photonics West OPTO 2017 Conference on Broadband Access Communication Technologies XI
Y2 - 31 January 2017 through 1 February 2017
ER -