This likely won't work at 1MHz. A LD takes a bit of time to begin "lasing". The modulation depth should be just above the minimum lasing threshold for 100% modulation.Would turning the laser on and off suffice?
even less frequency is okay 500khz or 100kHz for what ever frequencies i need a circuitThis likely won't work at 1MHz. A LD takes a bit of time to begin "lasing". The modulation depth should be just above the minimum lasing threshold for 100% modulation.
Google electro-optic amplitude modulator.Hi any one please help to modulation of a green laser circuit for laser pointer 120mA is threshold current 2.4v threshold voltage.maximum is 200mA
I need it for analog signal modulation for my degree project.
Amplitude modulationNot sure what kind of modulation you want. But here is a simple amplitude or frequency modulator.
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Sorry, I don't know about ofdm. Maybe someone else does.Amplitude modulation
Sending an ofdm analog signal through laser
can u send the ltspice file
In my opinion, the transformer's secondary in series with the laser's supply is the best suggestion offered so far in that if the laser is biased quiescently, through the transformer so that the laser will emit about half power, CW, when the modulator's contribution is nil then, when the transformer starts working, it'll add and subtract voltage / current into the LED, making its output brighter or dimmer.One may put a transformer in series with the laser current. This will allow you to modulate the laser in a number of ways.
The first thing to study is the laser data sheet.
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