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A simple experimental scheme for M-QAM optical signals generation |
Lei LEI( ), Yu YU, Fei LOU, Zheng ZHANG, Lei XIANG, Xinliang ZHANG |
| Wuhan National Laboratory for Optoelectronics, College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China |
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Abstract A simple scheme to generate optical quadrature amplitude modulation (QAM) signals is proposed based on different types of delay interferometers (DIs). The simulated results show that 16QAM, 64QAM and 256 QAM optical signals can be generated by 2×2, 3×3 and 4×4 DI, respectively, and the outputs of the proposed scheme are similar to those of the conventional schemes. The operation principle is discussed and the transmission properties of the square 16QAM as well as 64QAM signals are analyzed and compared with common approach.
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| Keywords
advanced modulation formats
multi-level modulation formats
quadrature amplitude modulation
delay interferometers (DIs)
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Corresponding Author(s):
LEI Lei,Email:leileihust@gmail.com
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Issue Date: 05 June 2012
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