The value of R1 is determined by the maximum laser current required (in this case, 250 mA), adjusted by the laser diode's typical forward voltage of 2.0 V as given on the datasheet. Solving for R1 ...

The datasheet for this LED shows a nominal forward current of 500mA, and a maximum of 1000mA. ... Laser diodes have I-V characteristics are strongly dependent on temperature, ...

Optical frequency chirp of an external-cavity laser is linearized by optimizing the modulation waveform for long-range FMCW optical ranging system. The modulation signal of the laser is sampled with ...