外腔半導體雷射的光學鎖相｜國立清華大學博碩士論文庫

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研究生：	楊致芸 Chih-Yun Yang
論文名稱：	外腔半導體雷射的光學鎖相 Optical Phase Lock of External-cavity Diode Laser
指導教授：	余怡德 Ite A. Yu
口試委員:
學位類別：	碩士 Master
系所名稱：	理學院 - 物理學系 Department of Physics
論文出版年：	2004
畢業學年度：	92
語文別：	英文
論文頁數：	78
中文關鍵詞：	鎖相迴路、外腔雷射
外文關鍵詞：	phase lock loop, optical phase lock loop, external cavity laser
相關次數：	點閱：3 下載：0
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本論文是利用光學鎖相迴路來進行兩台外腔雷射的光學鎖相研究.
本論文已經成功達到兩台雷射鎖相位的目的.當鎖相成功時,雷射拍頻的線寬為40Hz,而capture range大約為5MHz,locking range 大約為700MHz,而,兩台雷射的頻率差可為100,200或300MHz;再者,當加入積分器於系統中,可保持鎖相狀態4個小時.
本系統可用雷射電流源,或是自製的電子線路來達到兩台外腔雷射的鎖相.再者,相較於其他論文,本系統不需要額外的特殊條件,並且,系統中所使用的儀器接容易取得,為本論文的另一優點.

This thesis reports the studying of the optical phase locked loop.
The system is successful in phase locking two external cavity lasers: in phase-locked states, the bandwidth of the lasers’ beat signal is about 40 Hz, the capture range is about 5MHz, the lock range is about 700MHz and the offset frequency between the two lasers can be 100, 200 and 300MHz; moreover, by using the integrator, the phase-locked states can be kept in 4 hours.
There are some advantages of my experiment. First of all is that I have two methods to phase lock two external cavity lasers. The modulation function of a laser current source is not an important point when the system needs a laser current source. Both a modulation function of a laser current source and electronic circuits that homemade can work for phase locking. Moreover, the apparatus in the system are easy to get.

Acknowledgment

Chapter 1   Introduction    1

Chapter 2   Fundamentals of the optical phase locked loop    3
 2.1   Fundamentals of the OPLL    3
   2.1.1   The basics of the HOPLL     3
   2.1.2   The analog phase detector    5
   2.1.3   A loop gain    6
   2.1.4   Capture range and lock range    7
 2.2   Important factors in the OPLL    8

Chapter 3   Experiment (1)     10
 3.1   Experiment    10
   3.1.1   Experimental set-up    10
   3.1.2   The fastest compensation-circuit    11
   3.1.3   The middle compensation-circuit    12
   3.1.4   The slowest compensation-circuit    12
   3.1.5   Parameters of my system    17
 3.2   Operative steps    18
   3.2.1    Operative steps     18
   3.2.2    Summary    21
 3.3   Results for phase-locked states    22
   3.3.1   Experimental parameters    22
   3.3.2   Phase-locked states in power scale    24
   3.3.3   Phase-locked states in linear scale    25
   3.3.4   Discussion    26
 3.4   Results for using an integrator    26
   3.4.1   Results and parameters    26
   3.4.2   Discussion and summary    27
 3.5   Summary    27

Chapter 4   Further discussions of experiment (1)     28
 4.1   Capture range    28
   4.1.1   The bandwidth of the fastest compensation-circuit    28
   4.1.2   The resistor of the low pass filter of the middle compensation-circuit    31
   4.1.3   Powers of the input signals    33
   4.1.4   Offset frequency    35
   4.1.5   Summary    37
 4.2   Integrator    38
   4.2.1   Time constant    39
   4.2.2   Discussion and summary    39
 4.3   Phase detector    40
   4.3.1   Capture range    40
   4.3.2   Impedance match    43

Chapter 5   Experiment (2)     46
 5.1   Experimental set up    46
 5.2   Results    48
 5.3   Parameters    50
 5.4   Discussion    50
 5.5   Summary     51

Chapter 6   Conclusion    52

References    53

List of figures    55

List of abbreviations    56

Appendices
A.      External cavity laser    57
A.1   Grating-stabilized diode laser    57
A.2   Laser diode    58
A.3   Diffraction grating    61
A.4   External cavity laser    64
A.4.1   Structure     65
A.4.2   The steps for assembling    69
A.4.3   The steps for adjusting the wavelength of the ECL     70
A.5   Conclusion    73
B.      Behaviors of the input signals    74
B.1   Behaviors of the beat signal in unlock states     74
B.2   Behaviors of the reference signal    76
B.3.    Parameters    78

                                

References
[1] L.Ricci, M. Weidemuller, T. Esslinger, A. Hemmerich, C. Zimmermann, V. Vuletic W. Konig and T.W. Hansch, “A compact grating-stablized diode laser system for atomic physics,” Optics Communications 117 (1995) 541-549.
[2] G. Santarelli, A. Clairon, S.N. Lea and G.M. Tino, “Heterodyne optical phase-locking of extended-cavity semiconductor lasers at 9 GHz,” Optics Communications 104 (1994) 339-344.
[3] Zhencan Frank Fan, Peter J.S. Hein and Mario Dagenais, “High coherent RF signal generation by heterodyne optical phase locking of external cavity semiconductor lasers,” IEEE Photonics technology letters 10(5) (1998) 719-721.
[4] Zhencan Frank Fan and Mario Dagenais, “Optical generation of a mHz-linewidth microwave signal using semiconductor lasers and a discriminator-aided phase-locked loop,” IEEE Transactions on microwave and techniques 45(8) (1997) 1296-1300.
[5] R.C. Steele,” Optical phase-locked loop using semiconductor laser diodes,” Electronics letters 19(2) (1983) 69-70.
[6] R.T. Ramos and A.J. Seeds, “Fast heterodyne optical phase-lock loop using double quantum well laser diodes,” Electronics letters 28(1) (1992) 82-83.
[7] Roland E. Best, Best Phase-Locked Loop: theory, design, and applications, McGraw-Hill (1984)
[8] Hecht, Optics, third edition, Addison Wesley.
[9] Horowitz and hill, The art of electronics, second edition, Cambridge.
[10] Bob Azmoun and Susan Metz: Recipe for locking an external cavity diode laser from the group up.
[11] M.C.R. Hoogeveen: Stabilizing a diode laser to an external reference- development of the electronic locking circuit.
[12] 施宙聰 , 陳皙墩 “穩頻半導體雷射”,科學新知第十四卷第五期,民國82年.

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