Title :
High-sensitivity semiconductor optically preamplified Q-PPM receiver
Author :
Helm, P.J.S. ; Dagenais, Mario ; Krainak, Michael A. ; Leavitt, Rich
Author_Institution :
Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA
Abstract :
An optically preamplified receiver for 980-nm laser intersatellite communications is reported. A record sensitivity of 330 photons/bit for a semiconductor optically preamplified receiver is obtained at 50 Mb/s with quaternary pulse-position-modulation (Q-PPM). The experimental results are shown to be in excellent agreement with a novel exact calculation of the optically preamplified receiver Q-PPM bit-error rate (BER). Calculated performance based on these results shows that with an improved optical transmitter the receiver attains 1.5 dB higher sensitivity than previously achieved at this wavelength.
Keywords :
high-speed optical techniques; optical receivers; pulse position modulation; quantum well lasers; satellite communication; sensitivity; 41 dB; 50 Mbit/s; 980 nm; 993 nm; InGaAs-GaAs; InGaAs-GaAs SQW SCH laser; bit-error rate; high-sensitivity; laser intersatellite communications; performance calculation; quaternary pulse-position-modulation; semiconductor optically preamplified Q-PPM receiver; Optical filters; Optical noise; Optical receivers; Optical recording; Optical saturation; Optical sensors; Optical transmitters; Preamplifiers; Semiconductor optical amplifiers; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
