Lecture 25 ch 10 Molecular Gas Lasers II and sample 3 exam Fall 2017mirov/Lecture 25 ch 10... ·...

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Tentative Schedule:

Date, Place & Time Topics1 Aug. 28 (Mo) 394; 5:00- 6:15 Introduction, Spontaneous and Stimulated Transitions (Ch. 1) – Lecture

Notes2 Aug. 30 (We) 394; 5:00-6:15 Spontaneous and Stimulated Transitions (Ch. 1) – Lecture Notes

Homework 1: PH481 Ch.1 problems 1.4 &1.6 PH581 Ch.1 problems 1.4, 1.6 & 1.8 due Sep.6 before class

Sep.4 (Mo) No classes Labor Day Holiday3 Sep. 6 (We) 394; 5:00-6:15 Optical Frequency Amplifiers (Ch. 2.1-2.4) – Lecture Notes

Problem solving for Ch.14 Sep. 11 (Mo) 394; 5:00-6:15 Optical Frequency Amplifiers (Ch. 2.5-2.10) – Lecture Notes

Homework 2: PH481 Ch.2 problems 2.2 (a,b), 2.4 & 2.5 (a,b) PH581 Ch.2 problems 2.2 (a,b), 2.4 & 2.5 (a,b,c,d) due Sep.20 before class

5 Sep. 13 (We) 394; 5:00-6:15 Problem solving for Ch.2 Introduction to two Practical Laser Systems (The Ruby Laser, The Helium Neon Laser) (Ch. 3) – Lecture Notes

6 Sep. 18 (Mo) 394; 5:00-6:15 Review Chapters 1 & 2 – Lecture Notes7 Sep. 20 (We) 394; 5:00-6:15 Exam 1 Over Chapters 1-3; Grades for exam 18 Sep. 25 (Mo) 394; 5:00-6:15 Exam 1 problem solving. Passive Optical Resonators (Lecture notes)9 Sep. 27 (We) 394; 5:00-6:15 Passive Optical Resonators (Lecture notes). 10 Oct. 2 (Mo) 394; 5:00-6:15 Passive Optical Resonators (Lecture notes). Physical significance of ’ and

’’ (Ch.2.8-2.9). Homework 3: read Ch.2 & notes. Work out problems. Due Oct. 9

11 Oct. 4 (We) 394; 5:00-6:15 Optical Resonators Containing Amplifying Media (4.1-2).12 Oct. 9 (Mo) 394; 5:00-6:15 Optical Resonators Containing Amplifying Media (Ch.4.3-4.7) Homework

4: Ch. 4 problems 4.7 and 4.9. Due Oct 16.13 Oct. 11 (We) 394; 5:00-6:15 Laser Radiation (Ch. 5.1-5.4)14 Oct. 16 (Mo) 394; 5:00-6:15 Control of Laser Oscillators (6.1-6.3) Homework 5: Ch. 5 problems 5.1 and

5.5. Due Oct 23.15 Oct. 18 (We) 394; 5:00-6:15 Control of Laser Oscillators (6.4-6.5) and exam 2 review16 Oct. 23 (Mo) 394; 5:00-6:15 Optically Pumped Solid State Lasers (7.1-7.11)17 Oct. 25 (We) 394; 5:00-6:15 Optically Pumped Solid State Lasers (7.1-7.11)18 Oct. 30 (Mo) 394; 5:00-6:15 Exam 2 Over Chapters 4-6 Grades for exam 2

Exam 2 correct solution; Homework 6 Due Nov.6; Article on Cr:CdSe19 Nov. 1 (We) 394; 5:00-6:15 Optically Pumped Solid State Lasers (7.16-7.17)20 Nov. 6 (Mo) 394; 5:00-6:15 Optically Pumped Solid State Lasers (7.16-7.17) Homework 7 Due Nov. 1321 Nov. 8 (We) 394; 5:00-6:15 Optically Pumped Solid State Lasers (7.14-7.15) Supplemental material for

Homework 6–diode pumped LiF:F2- laser

22 Nov. 13 (Mo) 394; 5:00-6:15 Spectroscopy of Common Lasers and Gas Lasers (Ch. 8.1-8.10 and class material) Voluntary supplemental homework 6A design of RT CW Fe:ZnSe laser Due Nov.27

23 Nov. 15 (We) 394; 5:00-6:15 Gas lasers (Ch. 8.4 -8.10); Molecular Gas lasers I (Ch. 9.1-9.5) Nov.20 (Mo) No classes Thanksgiving - no classes held Nov.22 (We) No classes Thanksgiving - no classes held 24 Nov. 27 (Mo) 394; 5:00-6:15 Molecular Gas lasers I (Ch. 9.1-9.5) Homework 8 Due Dec. 425 Nov. 29 (We) 394; 5:00-6:15 Molecular Gas Lasers II (Ch. 10.1-10.8) and review for exam 3 (Ch. 10.1-

10.8) Homework 9 Due Dec 6 26 Dec. 4 (Mo) 394; 5:00-6:15 Exam 3 Over Chapters 7-10 Grades; Exam 3 Correct solution27 Dec. 6 (We) 394; 5:00-6:15 Review for Final 28 Dec. 11 (Mon) in CH 394 FINAL EXAM Over Chapters 1-10 (4:15-6:45pm) in CH 394 Final

Grades

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Laser Physics II (PH582 Spring 2018) Tentative Schedule: # Date Text Topics1 Jan 8 (Mo) LEO Ch11.1-11.4, Class Lecture Tunable Lasers, Organic Dye Lasers 2 Jan 10 (We)

LEO Ch11.1-11.4, Class Lecture Tunable Solid State Lasers, Alexandrite & Ti-Sapph.

Lasers, TM:II-VI Lasers(Class Lecture) Homework 1, Due January 24, 2016

3 Jan 15 (Mo) MLK Holiday No classes 4 Jan 17 (We)

LEO Ch11.1-11.4, Class Lecture Tunable Solid State Lasers, Alexandrite & Ti-Sapph.

Lasers, TM:II-VI Lasers(Class Lecture) Jan 22 (Mo) Class Lecture Color Center Lasers5 Jan 24 (We) Exam 1 - Grades Exam 1 over chapter 11 – Correct Solution 6 Jan 29 (Mo) Ch 12.1-12.7 and class lecture Semiconductor Lasers, Semiconductor Physics

Background 7 Jan 31 (We) Ch 12.1-12.7 and class lecture Semiconductor Lasers, Semiconductor Physics

Background, Homework 2, Due February 7, 20168 Feb 5 (Mo) (Ch.12.8-12.15) Semiconductor Lasers9 Feb 7 (We) (Ch.12.8-12.15)

(Class Lecture, Ch.13) Semiconductor Lasers Ray Tracing in an Optical System Homework 3, Due March 5, 2016

10 Feb 12 (Mo) (Class Lecture, Ch.13) Semiconductor problem Solving Ray Tracing in an Optical System

11 Feb 14 (We) (Class Lecture or Ch.16.1-16.7) Gaussian Beams12 Feb 19 (Mo) (Class Lecture or Ch.16.1-16.7) Gaussian Beams13 Feb 21 (We) (Class Lecture or Ch.15 and

Ch.16.8-16.14)Optical Cavities

14 Feb 26 (Mo) (Class Lecture or Ch.15 and Ch.16.8-16.14)

Optical Cavities; Three and four Mirror Focused Cavities

15 Feb 28 (We) (Ch.16.8-16.14) Optical Cavities; Cavities for Producing Spectral Narrowing of Laser Output Sample Problems for Test 2

16 Mar 5 (Mo) Exam 2 Grades Exam 2 over chapters 13-16 Correct Solutions17 Mar 7 (We) (LEO Ch. 17) Optics of Anisotropic Media Homework #4 problems

17.2; 17.3; 17.4; 17.5 ch.17 LEO Due March 16. Mar 12 (Mo) Spring Break No classes Mar 14 (We) Spring Break No classes 18 Mar 19 (Mo) (LEO Ch. 17) Optics of Anisotropic Media19 Mar 21 (We) (LEO Ch. 19, 20) Wave Propagation in Nonlinear Media Homework # 5 du

March 28 20 Mar 26(Mo) (LEO Ch. 19,20) 2nd Harm. Generation. Up and Down-Conversion, Optic

Parametr. Amplification;21 Mar 28 (We) (LEO Ch. 19,20) 2nd Harm. Generation. Up and Down-Conversion, Optic

Parametr. Amplification22 Apr 2 (Mo) (LEO Ch. 18) The Electro-Optics and Acousto-Optic Effects and

Modulaton of Light Beams Homework #6 due April 9 Homework #5 review

23 April 4 (We) (LEO Ch.21.1-21.6) Detection of Optical Radiation24 April 9 (Mo) (LEO Ch.21.6-21.8) Noise in Photodetectors Homework #7 due April 1625 April 11 (We) (LEO Ch.21.6-21.8) Photodiode Arrays and CCDs; Sample problems for test 26 April 16 (Mo) Exam 3 Grades Exam 3 over chapters 18-22 Correct Solutions27 April 18 (We) Review for Final Review for Final 28 April 23 (Mo) FINAL GRADES FINAL EXAM Over Chapters 11-22 and class notes

4:15-6:45pm CH 394

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Laser Physics IPH581-VT (Mirov)

Molecular Gas Lasers II

Lecture 25

Fall 2017C. Davis, “Lasers and Electro-optics”

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Molecular Gas Lasers II

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Gas Dynamic Lasers

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High Pressure Pulsed Gas Lasers

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Photodissociation Lasers

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Chemical Lasers

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Far-Infrared Lasers

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LASER PHYSICS I PH 481/581-VT (MIROV)Sample Exam 3

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3. A continuous wave Nd:YAG (1064 nm) laser is longitudinally pumped at 808 nm. The laser mode has a spot size of 2 mm and the length of the cavity is 10 cm; the stimulated emission cross-section is e= 2.8x10-19 cm2 and the upper level lifetime is =230 s. Assume that an output coupler with a transmission T=12% is used, passive cavity losses are negligible, branching ratio p=1, and a pump utilization efficiency a=75%. Calculate the pump power required to obtain an output power Pout=45W

from this laser. (Hint: shI

; s SP I A , where A is the mode size area in the crystal).

11 2

16 3

v 1 3

1 11) ln 0 ln 1 0.88 0.006410

2) 2.28 10

3) P 3.3 10 /( )

4)

th

thth

th pth

a qe

Threshold gain R R cml

Population inversion N cm

N hvThe absorbed threshold pump power per unit volume W cm

v

The a

2

8349

3 219 6

33 0.2 / 4 10 11

455) 1 0.75 0.759 1 11 ; 11 90 ;Alternatively:0.569

3 106.6 10 1064 106) 2.9 10 / ; 2.92.8 10 230 10

vth th

out p a qe c p th p p

s s s

bsorbed pump power P P V W

P P P P P W

hvI W cm P I A

3 210 0.2 / 4 91

1 917) ln (1 ) (1 0.88) 198081 0.751064

458) 1 0.75 0.759 1 19 ; 19 980.569

s sth

p qe a p qe a

out p a qe c p th p p

W

P PP S WS

P P P P P W

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Problem. Giant Pulse Ruby Laser

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