Browsing by Author "Chen, Kuan-Zhou"

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224-Gbps Transmission for Next-Generation WDM Long-Reach PON Using CAP Modulation
(2016)
Chen, Kuan-Zhou
;
Chen, Li-Wei
;
Lin, Che-Yu
;
Huang, Wan-Jou
;
Wei, Chia-Chien
Leveraging high transmission bandwidth and loss budget provided by high launch power, we experimentally demonstrate 4-lambda 224-Gbps 32-CAP 60-km transmission using cost-effective 10-GHz-class EAM/PIN, supporting > 3-Gbps/ONU for a 64-ONU LR-PON, without inline and pre-amplifier.
High-Capacity Carrierless Amplitude and Phase Modulation for WDM Long-Reach PON Featuring High Loss Budget
(2017-02-15)
Wei, Chia-Chien
;
Chen, Kuan-Zhou
;
Chen, Li-Wei
;
Lin, Che-Yu
;
Huang, Wan-Jou
This paper utilizes spectrally efficient carrierless amplitude and phase (CAP) modulation and four wavelength division multiplexing channels in formulation of a high-capacity transmission system. The dispersion and loss associated with a single-mode fiber of 60 km can result in severe power fading and insufficient loss budget, respectively. This study employed high launch power to overcome these issues and thereby achieve long-reach transmission without the need for dispersion compensation or an optical inline amplifier. Modified Volterra filtering is used to deal with the linear and nonlinear distortions within the system. This allowed for the inclusion of cost-effective 10-GHz-class electro-absorption modulators and p-i-n detectors for 4-lambda 224-Gb/s 32-CAP 60-km transmission with a loss budget of 26 dB/channel. The proposed system provides support for the 64 optical network units (ONUs) with downstream transmission of > 3 Gb/s/ONU for future long-reach passive optical networks. We also examined the transmission performance of each channel under various launch powers. Increasing launch power from 9 to 18 dBm/channel increases the loss budget by 9 dB and expands the total capacity by 42%.
High-Speed and Duo-Mode 850 nm VCSELs for 47 Gbps Optical Interconnect over 1 km OM4 Fiber
(2015)
Lu, I-Cheng
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Wei, Chia-Chien
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Chen, Hsing-Yu
;
Chen, Kuan-Zhou
;
Huang, Cheng-Hsiang
Novel duo-mode 850nm VCSELs with short (lambda/2) cavity, oxide-relief and Zn-diffusion apertures are demonstrated to balance the trade-off of speed and reaching bottleneck of VCSELs. Extremely-high data rate (47-Gbps) over 1005m OM4-fiber transmission is reported.
Very High Bit-Rate Distance Product Using High-Power Single-Mode 850-nm VCSEL With Discrete Multitone Modulation Formats Through OM4 Multimode Fiber
(2015-11-01)
Lu, I-Cheng
;
Wei, Chia-Chien
;
Chen, Hsing-Yu
;
Chen, Kuan-Zhou
;
Huang, Cheng-Hsiang
In order to investigate the tradeoff between optical spectral width and modulation speed of 850-nm Zn-diffusion vertical-cavity surface-emitting laser (VCSEL) and its influence on the performance of discrete multitone (DMT) modulation, two kinds of high-speed VCSEL structures with different cavity lengths (lambda/2 and 3 lambda/2) are studied. By shortening the cavity length to lambda/2, allocating the oxide layer in the standing-wave peak, and performing a Zn-diffusion aperture in our VCSEL structure, stable dual mode in the output optical spectra across the full range of bias currents with good high-speed performance (similar to 16-GHz bandwidth) can be achieved. Compared with its multimode reference, it shows far less roll-off with regard to the maximum data rate versus transmission distance over OM4 multimode fibers under forward error correction (FEC) threshold (BER < 3.8 x 10(-3)). On the other hand, for the 3 lambda/2 VCSEL structure, by using the same Zn-diffusion conditions as those of dual-mode counterpart, highly single-mode operation (side-mode suppression ratio > 35 dB) with high available power can be achieved over the full range of bias currents. Although such device shows a smaller 3-dB electrical-to-optical bandwidth (12 versus 16 GHz) than that of the dual-mode one, it exhibits a superior transmission performance by use of DMT modulation format. A record high bit-rate distance product (107.6 Gb/s.km) at nearly 50-Gb/s transmission under FEC threshold (BER < 3.8 x 10(-3)) through 2.2-km OM4 fibers has been successfully demonstrated by the use of single-mode VCSEL with optimized structures. In addition, error-free (BER< 1 x 10(-12)) transmission at 20.3 Gb/s with bit-rate distance product of 44.66 Gb/s.km has also been demonstrated.