WOW, That was a fast response time. Thanks for the info. Yes, Ktp crystals are much less expensive, Thanks. I'm going to ask another question that will display my ignorance on the subject. why do so many people use BBO crystals instead of KTO crystals? Is it because of the nm range? I will look...
BBO crystals allows for the production of entangled photons via Spontaneous parametric down-conversion. There transmission range is 200 nanometres to beyond 3 micrometres. They are however not cheap. I was wondering if anyone knew of an alternative to the BBO crystal for this application? THanks