Mon, 26 Nov 2001 Last week is Thanksgiving Holiday. During Thanksgiving, I read some books on Fiber Optics: 1. Fiber Optics Communication Systems By Govind P. Agrawal 2. Introduction to Fiber Optics by John Crisp(It is too simple.) So I got some ideas on geometrical-optics description about fiber: step-index one and graded-index one. I also know the concepts of fiber-modes according to Maxwell's equations. Thu, 29 Nov 2001 I went to Laser Center and discuss some fiber problems with another graduate student Quan Wen who also takes Optic Rotation. And I tried to get familiar with setting up the whole system. Fri, 30 Nov 2001 Today Dr. John Noe talk with me and give me some directions on how to adjust the fiber system and some ideas about my next step. By using multi-mode fiber and some tricks, I can get a pretty good output under single-mode fiber. Sat, 30 Nov 2001 Today I begin to read "Introduction to Fiber Optics" by Ajoy Ghatak and K. Thyagarajan. Wed, 5 Dec 2001 Through reading "Introduction to Fiber Optics", I got many ideas on characters of step-index fiber such as Gaussian distribution(far field), splice loss(angular, longitude, transverse), Petermann-2 spot size. Plus some understanding on dispersion of fiber. Fri, 7 Dec 2001 In laser center, I learned how to measure light density of original He-Ne laser and laser after fiber. It is really hard to fit as many as laser into fiber. It is also conceptually beautiful. Working with fibers builds a valuable skill for me. At the same time, Dr. John Noe told me some interesting ideas on polarization fluctuations in a Helium-Neon laser. He taught me how to get light density data through computer. It is really an interesting topic! Mon, 10 Dec 2001 With help of Dr. John Noe, I set up the whole system to measure intensity fluctuation of He-Ne laser. Dr. John Noe also showed me some interesting experiments on polarization such as short laser intensity fluctuation and sugar water polarization. Tues, 11 Dec 2001 I set up another system to measure the fiber's effect on intensity fluctuation. By changing the status of fiber (tighten or loose, straighten or loop), we can get the clear idea on it. It is really interesting!