LASER pro seriovy prenos

[Pavel Kudrna]

U projektu Ronja jsme zahledl cosi o max. modulaci laserovych
ukazovatek az 170MHz !?
To se zda byt hodne ze, ale asi to tak bude, pokud to neni ze
stejneho zdroje

http://www.repairfaq.org/sam/laserdio.htm#dioclpm
Tam se pise:
The Benefits of Cheap Laser Pointers for Modulation
... most laser pointers today have NO power regulator at all. What
I've been finding is a laser diode, resistor, switch, and two 1.5 V
batteries in series. Laser pointers like these can be modulated up
into the hundreds of Mhz as there is nothing to interfere with the
speed at which the laser can be turned on and off... 

Pavel Kudrna.


Petr Simek wrote:
> 
> On Thu, 11 Oct 2001 xmyslik@aldebaran.feld.cvut.cz wrote:
> 
> > > ten laser z GME F-LASER 5MW neni vhodny k tomuto ucelu, neda se rozumne
> > > modulovat a navic neni staven pro trvaly provoz (vysviti se)
> > > nevite nekdo, co je to za laser ten L-RLD78MA z katalogu GME ? ma to byt
> > > laser dioda IR 785 nm 5mW 5.6 mm
> > > jestli by se to nedalo pouzit...
> >
> > tak jsem nasel na siti pdfko (pres google a RLD78MA a je to laser do
> > diskmanu...)
> 
> Myslite ze by to mohlo mit lepsi modulacni schopnosti ? V datasheetu
> se uvadi parametr 'signal to noise ratio' a je uvaden pri f=720kHz a
> df=10kHz , ze by to snaselo modulacni frekvenci 720kHz ?
> 
> *------------------------------------------------------------------------*
> |                          Petr Simek   APS JU                           |
> |                             psimek@jcu.cz                              |
> *------------------------------------------------------------------------*