Fig. 1. Typical structure of densely multiplexed and remotely intergraded OFH system

Fig. 2. Transmission loss varying with wavelengths λ₁-λ₁₆ under different Δf

Fig. 3. Transmission loss varying with wavelengths λ₁-λ₁₆ under different L

Fig. 4. Transmission loss varying with wavelengths λ₁-λ₁₆ under different P_i

Fig. 5. Improved optical transmitter based on wavelength-staggered scheme

Fig. 6. Spectra of 100 km transmission system without WSU. (a) Input spectrum; (b) output spectrum

Fig. 7. Input and output optical powers after 100 km fiber transmission of signals of λ₁ to λ₁₆

Fig. 8. Comparison of simulation and measured results of 100 km transmission loss of signals of λ₁ to λ₁₆

Fig. 9. Spectra of 100 km transmission system with WSU. (a) Input spectrum; (b) output spectrum

Fig. 10. Comparison of phase noises of signals with wavelengths of λ₁ and λ₁₆ before and after 100 km WSU