Low-Noise, Single-Polarized, and High-Speed Vertical-Cavity Surface-Emitting Lasers for Very Short Reach Data Communication

A novel technique is demonstrated for suppressing the relative intensity noise (RIN) and enhancing the high-speed transmission performance of 850 nm vertical-cavity surface emitting lasers (VCSELs). The orthogonal polarization suppression ratio (OPSR) of top-emitting high-speed 850 nm VCSELs with re...

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Bibliographic Details
Published inJournal of lightwave technology Vol. 40; no. 12; pp. 3845 - 3854
Main Authors Huang, Yen-Yu, Chang, Yung-Hao, Zhao, Yaung-Cheng, Khan, Zuhaib, Ahmad, Zohauddin, Lee, Chia-Hung, Chang, Jui-Sheng, Liu, Cheng-Yi, Shi, Jin-Wei
Format Journal Article
LanguageEnglish
Published New York IEEE 15.06.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Copper
Electrochemical deposition
Electroplating
Fiber optics and optical communications
Frequency ranges
High speed
Mesas
Noise intensity
Optical variables measurement
Relative intensity noise
semi-conductor lasers
Semiconductor device measurement
Strain
Substrates
Timing jitter
Vertical cavity surface emission lasers
Vertical cavity surface emitting lasers
Vertical polarization
Vibration
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Summary:A novel technique is demonstrated for suppressing the relative intensity noise (RIN) and enhancing the high-speed transmission performance of 850 nm vertical-cavity surface emitting lasers (VCSELs). The orthogonal polarization suppression ratio (OPSR) of top-emitting high-speed 850 nm VCSELs with rectangular shaped mesas can be greatly enhanced by electroplating a copper substrate onto the backside, without any degradation in slope efficiency (output power). The enhancement of the OPSR results in a significant reduction of the RIN (around −130 vs. −145 dB/Hz) over a wide frequency range (near DC to 20 GHz) in comparison to the reference device without the additional copper substrate. Moreover, the structure of the demonstrated device can not only flatten the electrical-to-optical (E-O) responses but also narrow the spectral width due to the strain induced by the copper substrate. Overall, the lower RIN and flatter E-O frequency responses in turn lead to a significant improvement in the 25 Gbit/sec eye-opening and lower timing jitter in our demonstrated device.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2022.3151905