Optical phase‐sensitive amplification of higher‐order QAM signal with single Mach–Zehnder amplitude modulator

Autor:	S. Shimizu, T. Kobayashi, T. Kazama, T. Umeki, K. Enbutsu, R. Kasahara, Y. Miyamoto
Jazyk:	angličtina
Rok vydání:	2021
Předmět:	Fibre lasers and amplifiers Optical phase conjugation Multiwave mixing Optical beam modulators Optical computers logic elements and interconnects Amplifiers Electrical engineering. Electronics. Nuclear engineering TK1-9971
Zdroj:	Electronics Letters, Vol 57, Iss 1, Pp 32-33 (2021)
Druh dokumentu:	article
ISSN:	1350-911X 0013-5194
DOI:	10.1049/ell2.12002
Popis:	Abstract An optical phase‐sensitive amplifier (PSA) has the potential of low‐noise optical amplification. A frequency non‐degenerate PSA (ND‐PSA) can amplify arbitrary modulation formats including higher‐order QAM. The ND‐PSA requires a co‐propagating phase conjugated light (idler light) that has been conventionally created with an optical phase conjugator at the transmitter side. We propose a transmitter configuration using simultaneous signal generation of both a signal and its idler by double‐sideband modulation for transmission systems with ND‐PSAs. The proposed scheme provides a simple configuration with a single Mach–Zehnder amplitude modulator without optically creating the idler light. We performed experiments using 16QAM, 32QAM, and probabilistically shaped 256QAM signals. As a result, a phase‐sensitive amplification with each modulation format was successfully demonstrated using the proposed transmitter configuration.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/c60edad2434c4227b02d44dd00532a77 Zobrazit plný text záznamu Plný text View record in DOAJ