A Gain-Clamped SOA With Distributed Bragg Reflectors Fabricated Under Both Ends of Active Waveguide With Different Lengths

An Adjustable Gain-Clamped Semiconductor Optical Amplifier (AGC-SOA)

“…One approach is to use an external laser to clamp the SOA gain at the desired level [12], but more common implementations use wavelength-dependent reflectors to form a laser cavity. The cavity can be formed longitudinally along the signal path and be designed to lase outside the signal wavelengths of operation [13]- [15]. Alternatively, distributed Bragg reflectors can be used to form a vertical laser cavity, which is perpendicular to the signal propagation axis [16], [17].…”

A gain-clamped SOA-Raman hybrid amplifier for a CWDM access network without gain-saturation induced crosstalk

“…The GC-SRHA consists of a 1.5-,um GCSOA, with a bias current of 300-mA, and a RFA consisting of 3.5 km of OFS Raman fiber with 18.7 ,um2 effective area, 0.32 dB/km attenuation, -20 ps/nm/km dispersion, and 2.5 W'l/km Raman gain coefficient, all at 1550 nm. The GCSOA employs a distributed Bragg reflector region on a waveguide for fixing the carrier density [4]. The lasing signal for gain clamping is at 1490-nm wavelength as shown in Fig.…”

“…The overall gain of the GC-SRHA is dominated by the gain of the GCSOA rather than that of the RFA. Based on a previous demonstration of a 20-dB GCSOA [4], a 20-dB gain GC-SRHA should be possible. The polarization-dependent gain (PDG) ranges from 0.7 dB to 2.4 dB over the band due to the PDG of the GCSOA.…”

Spatial optical transmitter based on on/off keying line coding modulation scheme for optimum performance of telecommunication systems

“…Today, various data types are transmitted over communications networks, namely, text, audio, images, computer data, videos, and so on. Therefore, the network must be equipped with the requirements of all types of information and the communication networks must be independent of the information type [1][2][3][4][5][6]. The networks that support various information types are called multimedia networks.…”