10 Gbit/s, 100 km optical fibre transmission experiment using high-speed MQW DFB-LD and back-illuminated GaInAs APD

An optical bit-rate flexible transmission system with 5-Tb/s-km capacity employing multiple in-line erbium-doped fiber amplifiers

“…Qout(k) = Q I /~ (4) where Q, is the S I N ratio of the first amplifier output. Thus, Qr through k amplifiers is expressed as follows:…”

“…Multigigabit-per-second lightwave communication experiments have been conducted at several laboratories [ 11- [4]. As bit rates become higher, differences between the optical transmission output power and the receiver detectable power become increasingly smaller.…”

“…As bit rates become higher, differences between the optical transmission output power and the receiver detectable power become increasingly smaller. To overcome this problem, the development of an improved avalanche photodiode (APD) has been under study to increase the product of its gain and bandwidth [4]. The value of the product which is large enough to get the optimal multiplication factor at 10 Gb/s has not been obtained.…”

Optical Transmission Systems Toward Longer Reach and Larger Capacity

“…To remove these obstacles, the two approaches can be considered: (1) research and development of LDs and APDs with improved performance; and (2) separation of the Copyright © 2017 The Institute of Electronics, Information and Communication Engineers functions and proper assignments to various devices. With regard to the first option, application of ultra-fine grating technologies could made possible 10 Gbit/s transmission to long distances [4], [5]. With regard to the second option, a logical leap to accelerate the progress is to develop the key technologies which boost the advantages of each device.…”