Summary of State-of-the-Art IM / DD Link Performance
Parameter
Direct
External
Wavelength (mm)
Maximum Modulation Frequency (GHz)
Link Gain (dB)
Noise Figure (dB)
IM-free Dynamic Range *
Standard (dB-Hz2/3)
Linearized (dB-Hz2/3)
0.85, 1.3, 1.55
30
-5 to -35
20 to 60
100 to 114
120
1.3, 1.55
100
-30 to +30
4 to 30
112
130
10
* Assumed to be limited by 3rd-order distortion products
It should be possible to convey entire 0.1-30 GHz band simultaneously (rather than requiring a down-converting LO at the antenna site).