NDLI: Low-cost coaxial DFB LD transmitter optical subassembly for 25 Gb/s NRZ and 50 Gb/s PAM-4 transmissions

Content Provider	IET Digital Library
Author	Jou, Jau Ji Shih, Tien Tsorng Su, Zhe Xian Liao, Chuan Yu Wang, Wei
Abstract	Here, a directly modulated coaxial distributed feedback (DFB) laser diode (LD) transmitter optical subassembly (TOSA) module is proposed for 25 Gb/s non-return-to-zero (NRZ) and 50 Gb/s four-level pulse amplitude modulation (PAM-4) transmissions. A low-cost TO-56 header was used in the DFB LD TOSA package. The high-frequency performance of the coaxial 1310 nm DFB LD TOSA module was simulated and analysed. The simulated frequency response can correspond with the measured result, and the 3 dB bandwidth was 19 GHz. In the back-to-back and 10 km signal mode fibre transmissions, 25 Gb/s NRZ and 50 Gb/s PAM-4 eye diagrams of the DFB LD TOSA were measured. Clear 25 Gb/s NRZ and 50 Gb/s PAM-4 eye openings can be observed. For 25 Gb/s NRZ transmissions, the received sensitivity was −11.8 dBm under a bit error rate (BER) of 10−12. For 50 Gb/s PAM-4 transmissions, the BER was estimated to be below the forward error correction threshold. The low-cost coaxial DFB LD TOSA is suitable in 100, 200, and 400 Gb/s transmissions.
Starting Page	233
Ending Page	238
Page Count	6
ISSN	17518768
Volume Number	12
e-ISSN	17518776
Issue Number	Issue 5, Oct (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-opt/12/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-opt.2018.0027
Journal	IET Optoelectronics
Publisher Date	2018-04-26
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Bandwidth 19 GHz Bit Error Rate Bit Rate 100 Gbit/s Bit Rate 200 Gbit/s Bit Rate 25 Gbit/s Bit Rate 400 Gbit/s Bit Rate 50 Gbit/s Code Directly Modulated DFB LD Distance 10 Km Distributed Feedback Lasers Equipment And System Error Statistics Forward Error Correction Frequency Response High Frequency Performance Lasing Action in SemiConductor Low-cost Coaxial DFB LD Transmitter Optical Subassembly Modulation And Coding Method Nonreturn-to-zero Transmissions NRZ Optical Communication Device Optical Communication Equipment Optical Fibre Communication Optical Transmitters PAM-4 Transmissions Probability Theory Pulse Amplitude Modulation Semiconductor Laser Signal Mode Fibre Transmissions Statistics Stochastic Linearised SCUC TO-56 Header TOSA Module Wavelength 1310 Nm
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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