Table 5: Comparison of the proposed and existing DWDM system.

Authors, year, and reference numberNumber of output ports⁢Coupling efficiency (%) factor⁢Crosstalk (dB)Footprint (µm)2Spectral line-width (nm)
MinMaxMinMinMax

Rostami et al. 2010 [12] 442.586.53006−30.00−14.25360.4
NUSL

Liu et al. 2012 [13] 49999.59020
NUSL

Alipour-Banaei et al. 2013 [18] 44563561−23.70−7.5422.42.8
NUSL

Gupta and Janyani 2014 [14] 4408077950.2
USL

Kuo et al. 2007 [15] 62560416−27−173.2
NUSL

Rakhshani et al. 2013 [16] 6811002319−35−23
NUSL

Tian et al. 2013 [19] 865901969−18−158820.8
NUSL

Mehdizadeh and Soroosh 2016 [17]894981723−40−11.24951
NUSL

Proposed design1290997783.5−42−307840.2
USL

USL: uniform spectral linewidth for dropped wavelengths.
NUSL: nonuniform spectral linewidth for dropped wavelengths.