CMOS Linear Laser Driver for Intermediate Frequency over Fiber (IFoF) Links

The main objective of the proposed linear laser driver (LLD) is to reduce signal distortion in an analog direct modulation configuration used for intermediate frequency over fiber links. This work draws on open-loop featuring two differential pair blocks a cascade arrangement achieve bandwidth measurement 415 MHz at half-power point, total harmonic 4.57% fundamental 100 MHz, and amplitude mVpp. LLD provides gain 12.3 dB output impedance 46 Ω. design, layout, integration correspond process design kit TSMC 65-nm CMOS technology. Experimental results show advantage other previously reported drivers.