(1)Wavelength: That is, the operating wavelength of the laser tube, the wavelength of the laser tube currently available for photoelectric switching is 635 nm, 650 nm, 670 nm, 690 nm, 780 nm, 810 nm, 860 nm, 980 nm, and so on.
(2)The threshold current Ith: that is, the current at which the laser tube starts to generate laser oscillation. For a general low-power laser tube, the value is about several tens of milliamperes, and the threshold current of the laser tube having the strain multi-quantum well structure can be as low as 10 mA or less.
(3)Working current Iop: The driving current when the laser tube reaches the rated output power. This value is important for designing and debugging the laser driving circuit.
(4)Vertical divergence angle θ⊥: The angle at which the laser diode's illuminating band is opened in the direction of the vertical PN junction, generally around 15~40Degree.
(5)Horizontal divergence angle θ∥: The angle at which the illuminating band of the laser diode is opened in a direction parallel to the PN junction, generally around 6~10Degree.
(6)Monitor current Im: the current flowing through the PIN tube when the laser tube is at rated output power.