Hi LPF,
I've been wanting to gauge the output performance of my new diode with a LPM. I have access to a power meter in the optics lab of the physics department here at school, however it is only sensitive to HeNe wavelengths and this is a green diode. Instead, I figured a fun project would be to construct one, though it would probably be difficult. My question is, how is a LPM constructed? I envisioned a simple one using a phototransistor that would pass a current proportional to the power output of the light, and through a little math I could calculate the laser's power.
I've been wanting to gauge the output performance of my new diode with a LPM. I have access to a power meter in the optics lab of the physics department here at school, however it is only sensitive to HeNe wavelengths and this is a green diode. Instead, I figured a fun project would be to construct one, though it would probably be difficult. My question is, how is a LPM constructed? I envisioned a simple one using a phototransistor that would pass a current proportional to the power output of the light, and through a little math I could calculate the laser's power.