A Primer on Underwater Quantum Key Distribution

Table 12

System and channel parameters under consideration.

Parameter	Definition		Numerical value
	Code rate		0.5 [79]
	Field of view		180° [89]
	Filter spectral width		30 nm [95]
	Wavelength		530 nm [89]
	Bit period		35 ns [95]
	Receiver gate time		200 ps [95]
	Transmitter pupil diameter		10 cm [77]
	Receiver pupil diameter		10 cm [77]
	Quantum efficiency of Geiger-mode APDs		0.5 [77]
	Dark current count rate		60 hz [95]
	Asymptotic diffuse attenuation coefficient		0.08  [88]
	Depth		100 m [95]
	Transmitter beam divergence angle		6° [89]
	Extinction coefficient	Clear ocean	0.151  [94]
		Coastal ocean	0.339  [94]
		Turbid harbor	2.195  [94]
	Correction coefficient	= 6°,  cm	0.13 [89]
		= 6°,  cm	0.16 [89]
		= 6°,  cm	0.21 [89]
		= 6°,  cm	0.26 [89]