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- Islam, A. B. M. Hamidul, et al.
(author)
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Very low input voltage cascaded travelling wave electroabsorption modulator (CTWEAM) for more than 100 Gbps
- 2013
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In: Optics Communications. - : Elsevier BV. - 0030-4018 .- 1873-0310. ; 297, s. 43-47
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Journal article (peer-reviewed)abstract
- This paper presents the large signal modeling and simulation of two segmented travelling wave electroabsorption modulators (TWEAM) as a cascaded TWEAM (CTWEAM) structure. It will be demonstrated that a mushroom shaped mesa structure with low series resistance (0.69 Omega-mm) will have 3 dB bandwidth more than sufficient for 100 Gbps operation. For a CTWEAM device with 990 lam active segment length, 1.1 V bias voltage and only 0.4 V peak-to-peak (Vp-p) modulating voltage has a bandwidth of 110 GHz, extinction ratio >4 dB and flat frequency response. This device would be an attractive candidate for short distance optical fiber communication as well as long distance telecommunication at 0.4 Vp-p and 1 Vp-p input RF signal, respectively.
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