High-speed photodetectors for full-wavelength-band WDM transmission systems at 40Gb/s and beyond

Morio Wada; Tsuyoshi Yakihara; Akira Miura

doi:10.1117/12.579334

31 January 2005 High-speed photodetectors for full-wavelength-band WDM transmission systems at 40Gb/s and beyond

Morio Wada, Tsuyoshi Yakihara, Akira Miura

Proceedings Volume 5624, Semiconductor and Organic Optoelectronic Materials and Devices; (2005) https://doi.org/10.1117/12.579334
Event: Asia-Pacific Optical Communications, 2004, Beijing, China

Abstract

The capacity of the WDM system can be increased by increasing the useable optical bandwidth or using the available bandwidth more efficiently since bit. Ultra-wide-band WDM transmissions with high bit rates in the full-WDM-wavelength range from the O to U bands (1260-1675 nm) are also very attractive for achieving high-capacity WDM transmission at low cost. This paper represents the high-speed photodetectors with a 3-dB bandwidth of more than 50 GHz for full-wavelength-band WDM transmission systems at 40Gb/s and beyond. The photodetector is a back-illuminated lattice-mismatched InGaAs PIN photodiode that we designed and fabricated to operate with a 3-dB cut-off frequency to values above 40 GHz, in the full-WDM-wavelength range from the O to U bands, by applying a small junction diameter and reduced the thickness of the light-absorbing InGaAs layer with a lattice-mismatch of +0.2% to InP. For our photodiode modules, a 3-dB bandwidth as high as 65 GHz was achieved at a bias voltage of 3 V and the responsivities at wavelengths of 1310, 1552 and 1670 nm were 0.6, 0.65 and 0.55 A/W, respectively. 40Gb/s receivers and 10Gb/s PIN/TIA modules were described as applications of the FWB-PDs. The photodiode modules operating up to the bandwidth of 50GHz and above in the full-WDM-wavelength range can drive the development to 40Gb/s WDM transmission systems using RZ or NRZ format and the additional new channels in the U band.

Citation Download Citation

Morio Wada, Tsuyoshi Yakihara, and Akira Miura "High-speed photodetectors for full-wavelength-band WDM transmission systems at 40Gb/s and beyond", Proc. SPIE 5624, Semiconductor and Organic Optoelectronic Materials and Devices, (31 January 2005); https://doi.org/10.1117/12.579334

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