QUESTION: Our deposition tube diameter varies from run to run. Do you have information on how to control that? ANSWER: When you deposit barrier and core layers, your goal is consistent thickness every time. However, as you’re well aware, the burner flame...
QUESTION: Question for the Fiber Design and Manufacturing Expert. Do you have tips for those having difficulty achieving straight preforms? ANSWER: This is definitely an art and requires some practice. I have found procedures that deliver a reproducible...
QUESTION: Do you have any information on quartz tube-cleaning process best practices? ANSWER: The tube-cleaning process is a critical part of your preparation. Companies like SG Controls offer tube-cleaning machines with programmable cycles. The first...
QUESTION:
Can deposition temperature cause absorption in final fiber measurements?
ANSWER:
Low deposition temperature reduces OH diffusion to the core from the tube and burner, and prevents tube shrinkage. The lack of diameter control causes tube wall...
QUESTION: We are experiencing runout while rotating the lathe. How do you handle getting the runout under control?
ANSWER:
While rotating the lathe at approximately 40-50 RPM the rotary seal extension tube should have only a small amount of runout to...
QUESTION: Does initial tube straightening minimize runout? Do you have SOPs available on this?
ANSWER:
Initial deposition tube straightening is performed to minimize runout. Carefully using a hand burner at a low temperature will prevent vaporizing glass at...
