High-Speed and High-Power Performance of a Dual-Step Evanescently-Coupled Uni-Traveling-Carrier Photodiode at a 1.55¿m Wavelength

Wu, Yelin; Chiu, Pei-Chin; Shi, J.-W.

doi:10.1109/ofc.2007.4348673

Cited by 4 publications

(5 citation statements)

References 6 publications

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“…For example submicron lithography is often required to fabricate the laterally tapered couplers [7]. Recently it has been shown that the critical taper technology can be replaced by exploiting mode-beating effects in coupled multimode waveguides [13][14][15][16][17]. Figure 3 shows a schematic of an evanescently coupled photodiode that utilizes a short multimode input waveguide with optical matching layers [14].…”

Section: A Optical Couplingmentioning

confidence: 99%

“…However, since the waveguide to photodiode coupling is based on mode interference effects, the coupling efficiency depends on the length of the input waveguide section. This design constraint has been eliminated by using a dual-step coupling region [15,17]. Wu et al have reported high responsivity (~ 0.9 A/W) with a 50 μm tolerance in the length of the input waveguide and bandwidth of 60 GHz [17].…”

Section: A Optical Couplingmentioning

confidence: 99%

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High-speed, waveguide photodiodes

Campbell

Beling

2008

2008 International Topical Meeting on Microwave Photonics Jointly Held With the 2008 Asia-Pacific Microwave Photonics Conferenc

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Section: A Optical Couplingmentioning

confidence: 99%

Section: A Optical Couplingmentioning

confidence: 99%

High-speed, waveguide photodiodes

Campbell

Beling

2008

2008 International Topical Meeting on Microwave Photonics Jointly Held With the 2008 Asia-Pacific Microwave Photonics Conferenc

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“…1(a) and (b) show a conceptual cross-sectional view and top-view of the demonstrated module. Details of the structure of the optical waveguide can be referred to in our previous work [7]. The topmost active absorption region has a typical UTC-PD structure [3] with a 200-nm-thick InP collector.…”

mentioning

confidence: 99%

“…In order to realize the monolithic integration, we adopted the structure of an evanescently coupled photodiode (ECPD) [5] to construct the passive demultiplexer region and active photodiodes. The new ECPD was dual-stage in structure [6], [7] and different from that discussed in previously research [5]. It was difficult to fabricate due to the long ( 700 m) and tapered optical waveguide utilized for the power coupling process.…”

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confidence: 99%

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The Monolithic Integration of a Wavelength-Demultiplexer With Evanescently Coupled Uni-Traveling-Carrier Photodiodes

Chiu

Shi

et al. 2007

IEEE Photon. Technol. Lett.

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In this letter, we discuss a novel integration of a wavelength demultiplexer with a pair of uni-traveling-carrier photodiodes (UTC-PDs). With this integrated module, we could separate incoming wavelengths of 1530 and 1550 nm, which are near the wavelengths utilized for digital and analog signal transmission in coarse wavelength-division multiplexing (CWDM) systems. The integrated UTC-PDs exhibited the following advantages: a wide 3-dB bandwidth (25 GHz), a reasonable responsivity (0.35 A/W), and a high-saturation-current ( 17 mA). A low level of radio frequency crosstalk between the two photodiodes (less than 15 dB) could also be achieved for a wide frequency range (near DC to 40 GHz). This is low enough for the multichannel receivers in a WDM broadcast system. In addition, by use of our module, we demonstrated digital/analog signals co-transmission and demultiplexing with speeds of 2.5 Gb/s at optical wavelengths of 1530 and 1550 nm.Index Terms-Coarse wavelength-division multiplexing (CWDM), demultiplexer, photodiodes. G IVEN THE trend for reducing the cost of modern fiber communication systems, the technique of coarse wavelength-division multiplexing (CWDM) has recently attracted a lot of attention. Recently, low-cost, hybrid transceiver modules, composed of a wavelength-demultiplexer, photodiodes, and a Fabry-Perot laser for upstream/downstream data transmission, have been developed [1] and demonstrated for CWDM application. Monolithic integration of passive devices with other active devices, such as photodiodes, is another attractive solution because of their reduced package costs. However, the demonstrated net responsivity of monolithic integrated photodiodes with a WDM demultiplexer, such as an array-waveguide-grating (AWG), may be too small to serve as a receiver module [2]. In this letter, we demonstrate a novel monolithic integration of a pair of high-power uni-traveling-carrier photodiodes (UTC-PDs) [3] with a WDM demultiplexer [4], based on the structure of an evanescently coupled optical waveguide [5] for application in a CWDM system. We adopted the UTC-PD as the active device due its excellent performance in terms of speed and power [3], which makes it suitable for the analog fiber transmission [3]. The integrated passive demultiplexer can separate the incoming 1530 and 1550 nm wavelengths, which are near the wavelengths Manuscript Fig. 1. (a) A conceptual cross-sectional view and (b) top-view of the demonstrated modules. For clearness (a) was not drawn according to scale.used for transmitting the digital and video analog signals in a CWDM system. With this module, we demonstrated the co-transmission and demultiplexing of digital/analog signals at optical wavelengths of 1530 and 1550 nm with a 2.5-Gb/s modulation speed, without the use of a complex radio frequency (RF) filter.In order to realize the monolithic integration, we adopted the structure of an evanescently coupled photodiode (ECPD) [5] to construct the passive demultiplexer region and active photodiodes. The new ECPD was dual-stage in struc...

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Advances in Photodetectors and Optical Receivers

Beling

Campbell

2013

Optical Fiber Telecommunications

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High-Speed and High-Power Performance of a Dual-Step Evanescently-Coupled Uni-Traveling-Carrier Photodiode at a 1.55¿m Wavelength

Cited by 4 publications

References 6 publications

High-speed, waveguide photodiodes

High-speed, waveguide photodiodes

The Monolithic Integration of a Wavelength-Demultiplexer With Evanescently Coupled Uni-Traveling-Carrier Photodiodes

Advances in Photodetectors and Optical Receivers

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