I was wondering if it could be possible to modulate a CW laser to pico/nano seconds pulsed laser somehow. I need to generate that condition to pump DFB polymeric lasers.
Probably using acusto-optic modulator? Q-Switching technique?
Thanks
Hello,
to modulate in nanosecond regim you could use modulators, Acousto-optic are slower than electro-optics. If you want to use picsecond pulse theses techniques are not possible. You have to use a pulsed laser.
I could recommand you to read this white paper from a French company:
https://www.alphanov.com/sites/default/files/2020-03/Fiber-modulator-basics.pdf
you could also contact 3 companies that realize some box including modulator
- IDIL: https://www.idil-fibres-optiques.com/
-iXblue: https://www.ixblue.com/
-Aérodiode: https://www.aerodiode.com/
Regards,
Jeff
Greetings. In my opinion, the problem of "modulation of coherent continuous laser radiation" can be solved:
1. Interrupting the radiation by a mechanically rotating metal disc with slots (if the modulation frequency is not high) - option 1 for students;
2. Application of an integrated optical modulator (based on lithium niobate LiNO3). The physical basis is the division of the intensity of coherent radiation (IR) into two parts ("shoulders") and the effect of shifting its phase by 180 degrees (in one of them) with the subsequent interaction of these two AIs. Implementation - electro-optical Mach-Zehnder interferometer - option 2 for researchers.
3. References to literature, sources (Russian language) - if it necessary for you.
If my comments & advice were useful to you, please make a note / recommendation. Best wishes, Proskurin NP, PhD.
It is not good idea, to my opinion. At first you must estimate threshold pump energy of your polymeric lasers to be sure that the power of your CW laser is sufficient to irradiate threshold energy during pico/nanoseconds. Then, may be pulsed diode laser with all required electronics is cheaper than high speed optical modulator(for nanoseconds only. Pico is not possible) ?
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