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Course Information

Professor: Dr. Charles Durfee

Office: Timberline 1, room 15

Meeting Times:

class: M W 11:00-11:50 AM Green 211

lab: Th 9-11:50, GRL Annex

Announcements

6 Dec 2017 Presentations of your final projects are tomorrow in Alderson 368, starting at 9am. Plan a 10 minute talk, with slides. Written reports for your projects are due by end of day on Monday. If it is a paper copy, it needs to get to me (office or mailbox) by 5pm, if by email, by midnight.

30 Nov 2017 During lab today, we will meet in the GRL Annex upstairs where we met last time. Those of you who need more time and help with the ABCD calculations from last week can work on it then. There is another exercise with a notebook used to calculate threshold and output power of a laser oscillator that you will work on. That is posted below. For any other time that is remaining you can work on your projects and get help from me and Randy.

20 Nov 2017: due dates and times: HW and lab due today, tuesday 21 Nov. If paper, turn it in to me in my office or my mailbox by 4, or Randy's mailbox by 5. If by email, both due by midnight to me and Randy. The project outline is due tomorrow by midnight. That is just 1 page, as described below.

20 Nov 2017: I had a bad date in the notes about the research project regarding when to turn in a 1 page outline of the project. You can turn it in by email anytime through wednesday. Please include a title, a brief outline of what you plan to cover, and a list of at least 2 of your main references. If you are doing a project on a specific system, give some information on what kinds of calculations you intend to do as part of your modeling. If you are doing a project that is more a survey, online the scope of the field you will be describing. In both cases, the more you can do to have quantitative calculations the better. Ask me for ideas if you would like my input.

16 Nov 2017: For lab today, we will meet in our normal GRLA room, help pack the lab up, then we'll go up to the mezzanine north end and work with ABCD tracing. See the Mathematical notebook posted below in the Lab section.

14 Nov 2017: Lecture notes are up to date. HW4 is due by end of day Tuesday 21 Nov, not wednesday, since there are no classes that day. HW2, 3 are graded, I'll let you know where to pick them up, along with printed solutions, when I get them from Randy this morning.

I'm printing out more copies of solutions, and will leave them with Barbara at her desk.

12 Nov 2017: In class midterm is this coming wednesday, 15 Nov. Study guide is posted below in the homework/midterm section."

Posted homework is due the following tuesday.

4 Oct 2017: HW 3 is posted, and a revised version of the Lab 3 sheet is also posted. The revision does not change what to do, just hopefully provides better explanations.

27 Sept 2017: Lab 3 sheet is posted below.

25 Sept 2017: Lecture notes are posted.

For the last problem, there are several comments. 1. if you define the wave functions with the origin starting on one side of the box, you will have a constant term added to the dipole moment. This is an artifact of the choice of origin. Either you can define the origin to be in the middle of the box (giving sine and cosine functions), or you set the origin at one end and take only the time-dependent part. (I've worked it out both ways.) 2. you can assume the particle is an electron when you need a mass for calculating the energy. 3. Also, in the very last part, the numbers work out more realistically if you set the size of the box = 1nm instead of 0.1nm. This would be like a nanoparticle. Also note that the expression for the lifetime ( = 1/spontaneous emission rate) is in Svelto, and you use the time average of the dipole moment you calculate earlier in that problem.

18 Sept 2017: Homework 2 is posted.

6 Sept 2017: lectures 1-4 are all posted

30 August 2017: Homework 1 is posted.

Lab 1 is posted below.

28 August 2017: Welcome to Laser Physics!

I will be posting class notes and the first homework soon. Homework will be due wednesdays.

Notes for classes 1 and 2 are posted below.

Office hours

Times: M12:30-2:00, T 1-2, W12:30-2:00

Look for me in my office. If I'm anywhere else, I'll post a note.

Course Material

Syllabus and Reading List

Main text: O. Svelto, Principles of Lasers, 5th edition. There is also online access to the book from a campus/VPN connection:

http://www.springerlink.com/content/n72670/#section=672851&page=1

These downloads require Adobe Acrobat Reader

Course syllabus for 2017

Homework Assignments and Midterm:

Grading policy:

Turn in homework on time for full credit. At the time we give homeworks back to you, solutions will be available in printed form in a binder that I'll keep, but you can make a copy.

These downloads require Adobe Acrobat Reader

Homework 1, due wednesday 6 Sept 5 pm.

Homework 2, due wednesday 27 Sept 5 pm.

Homework 3, due wednesday 18 Oct 5 pm.

Homework 4, due wednesday 22 Nov 5 pm.

Midterm study guide. Midterm is Wednesday 15 Nov in class.

Lab exercises:

These downloads require Adobe Acrobat Reader

Lab 1 instruction sheet

Lab 2 instruction sheet

Lab 3 instruction sheet (updated 10/4/17)

Lab 4 instruction sheet

Lab 4 instruction sheet (new version with more exercises)

Lab 5 mathematica notebook for ABCD tracing

Lab 6 mathematica notebook for oscillator model

Final project

These downloads require Adobe Acrobat Reader

Final project guidelines and ideas

Lecture Notes

While these notes are primarily to help me give my lectures, I'm posting them to help you fill in things you may have missed in class or to show the details of calculations we don't have time to work through. If you have any constructive input on how to make these more useful to read, let me know.

Note: if an instructor would like to make use of these slides, please acknowledge me. I would be happy to share the original .pptx files on request (email).

These downloads require Adobe Acrobat Reader

Class 1 notes: intro to laser physics

Class 2 notes: EM waves

Class 3 notes: more EM waves

Class 4 notes: resonators and blackbody radiation

Class 5 notes: QM transitions 1 (updated 9/25/17 to fix typo in dipole calculation)

Classes 6,7 notes: QM transitions 2 Fermi Golden Rule

Class 8 notes: QM transitions 3 absorption and gain

Class 9 notes: rate equations, Einstein A and B coefficients

Class 10 notes: spectral line shapes and broadening

Class 11 notes: interference, Michelson, Mach-Zehnder, Fizeau

Class 12 notes: interference, tilted window, Fabry-Perot, multilayers