Table 6.

System specifications.

Emitter	Laser	Model	Kigre™ MK-85
		Centre wavelength, λ	1534 nm (Erbium glass laser)
		Spectral bandwidth	4.5 nm (FWHM)
		Pulse energy, E0	3 mJ
		Pulse duration, τl	6 ns
		Pulse repetition frequency, PRF	Single shot—10 Hz (adjustable)
	Beam Expander	Output beam diameter	16 mm
		Beam expansion	20×
		Output beam divergence, θ	∼210 μrad (full angle)
Receiver	Telescope	Model	Meade™ ETX80
		Primary lens diameter, d0	80 mm
	Interference Filter	Centre wavelength, λ	1530 nm
		Full width at half maximum, Δλ	12 nm
	APD Module	Model	Thorlabs™ APD110C
		Active area diameter, dD	0.2 mm
		Intrinsic Responsivity, Rio	0.9 A/W (1500 nm)
		Noise Equivalent Power, NEPm	0.46 pW/Hz1/2
		APD gain, M	10
		Transimpedance gain, G	105 V/A
		Output bandwidth (3 dB), BN	DC—50 MHz
	Digitizer	Model	GaGe™ CompuScope 12502
		Sampling rate	500 MS/s
		Resolution	12 bits