Recent Approaches for Broadening the Spectral Bandwidth in Resonant Cavity Optoelectronic Devices

Figure 1

(a) The VCSEL array and RCEPD array are separately passive aligned with planar waveguides such as multimode fiber (MMF) [33]. (b) Schematic diagram of cavity-mode wavelength alignment by using cavity-mode tuning of RCEPD chips [33] and (c) the related spectra without alignment. (d) The measured responsivity and CW lasing spectra of four elements from two RCEPD and VCSEL arrays in close proximity to each other [34].

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