[Aritomi, Yuhang]

 

Today while working on coherent control PLL, the mirror for ML PLL shown in an attached figure moved because the clamp for this mirror was actually loose.

So we have to re-align the fibers for ML PLL.

Today we aligned only ML-p pol fiber. The result is as follows.

 

Before fiber: 3.7 mW

After fiber and fiber BS: 550 uW 

Fiber coupling: 0.55*2/3.7 = 30%

 

We'll align ML-CC fiber next week.

 

We also found that the output of the fiber for ML-CC PLL fluctuates a lot.

We'll investigate the reason of this fluctuation.

 

Today while working on coherent control PLL, the mirror for ML PLL shown in an attached figure moved because the clamp for this mirror was actually loose.

So we have to re-align the fibers for ML PLL.

Today we aligned only ML-p pol fiber. The result is as follows.

 

Before fiber: 3.7 mW

After fiber and fiber BS: 550 uW 

 

So the fiber coupling for ML-p pol is 0.55*2/3.7 = 30%.

We'll align ML-CC fiber next week.

 

We also found that the output of the fiber for ML-CC PLL fluctuates a lot.

We'll investigate the reason of this fluctuation.

Today while working on coherent control PLL, the mirror for ML PLL shown in an attached figure moved because the clamp for this mirror was actually loose.

So we have to re-align the fibers for ML PLL.

Today we aligned only ML-p pol fiber. The result is as follows.

 

Before fiber: 3.7 mW

After fiber and fiber BS: 550 uW 

 

So the fiber coupling for ML-p pol is 0.55*2/3.7 = 30%.

We'll align ML-CC fiber next week.

 

We also found that the output of the fiber for ML-CC PLL fluctuates a lot.

We'll investigate the reason of this fluctuation.