Extended Reach 10 Gb/s Transmission with an Optical I/Q Modulator Using VCSELs over OFDM-Based Multimode Fiber Link

Figure 3

(a) Eye spectra in case of an optical I/Q modulator, (b) eye spectra in case of a direct modulator, (c) frequency spectra in case of an optical I/Q modulator, and (d) frequency spectra in case of a direct modulator.

(a)

(b)

(c)

(d)