An all-optical amplifier for terahertz AM signals: A proposal

• Published in: Journal of lightwave technology Vol. 5; no. 2; pp. 236 - 242
• Main Authors: Manneberg, G., Kull, M., Lindquist, S.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.02.1987; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Arm; Circuit properties; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Laser excitation; Miscellaneous; Nonlinear optics; Optical amplifiers; Optical and optoelectronic circuits; Optical interferometry; Optical modulation; Optical pumping; Proposals; Semiconductor optical amplifiers; Stimulated emission; Integrated optics; Mach Zehnder interferometer; Modulated signal; Optical amplifier; Amplitude modulation; All optical circuit; Semiconductor laser
• DOI: 10.1109/JLT.1987.1075489
• ISSN: 0733-8724

We propose an all-optical amplifier for AM signals which, in principle, is an integrated Mach-Zehnder interferometer where both arms are pumped with light from the incoming signal, amplified in a semiconductor laser amplifier. Thus the pump is the time integrated phase and amplitude average of the signal. In one of the arms a part of the nonamplified signal is injected, which modulates the optical path length in that arm with the optical Kerr effect. After the final junction between the arms, the outgoing light is proved to carry a part of the amplitude of the pump and the modulation of the signal.