서지주요정보
수직 공진 표면광 레이저의 편광 안정 연구 = New method to stabilize polarization of vertical-cavity surface-emitting laser
서명 / 저자 수직 공진 표면광 레이저의 편광 안정 연구 = New method to stabilize polarization of vertical-cavity surface-emitting laser / 서정훈.
발행사항 [대전 : 한국과학기술원, 1995].
Online Access 제한공개(로그인 후 원문보기 가능)원문

소장정보

등록번호

8005098

소장위치/청구기호

학술문화관(문화관) 보존서고

MPH 95011

휴대폰 전송

도서상태

이용가능

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반납예정일

리뷰정보

초록정보

A new method to stabilize the polarization of vertical-cavity surface-emitting laser(VCSEL) was proposed and characteristics of the laser were investigated. Polarization-stabilizing structure consists of fine grating pattern etched at the top layer of distributed Bragg reflector(DBR). On the sidewalls of the grating grooves, aluminium was thermally deposited to enhance polarization selectivity. The tested periods of the grating grooves were 0.9 ㎛, 1.2 ㎛, and 1.5 ㎛, and the widths were half of the periods. After the deposition, lasers with window sizes of 10 ㎛, 15 ㎛, 20 ㎛, 30 ㎛ were fabricated in usual procedure. After the fabrication, L-I curve and transverse mode image of VCSEL were investigated with a polarizer. Polarization-stabilized VCSEL's whose grating periods are 1.2 ㎛ and 1.5 ㎛ lased in TM mode only. The polarization ratio was well over 25:1, and threshold currents were almost the same with those of VCSEL's without the grating. VCSEL with 0.9-㎛-grating did not lase in stabilized polarization, which means that exact calculation of diffraction theory should be conducted for each groove width and depth to fully understand the function of the metal-clad grating. On the contrary, polarization of VCSEL without the grating was not stabilized. Polarization of higher transverse mode was orthogonal to that of fundamental mode, and therefore, two polarization mode lased simultaneously in high current region. Moreover, near field image taken by CCD camera revealed that higher modes tend to lase in spatially exclusive manner.

서지기타정보

서지기타정보
청구기호 {MPH 95011
형태사항 [iii], 53 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Jung-Hoon Ser
지도교수의 한글표기 : 이용희
지도교수의 영문표기 : Yong-Hee Lee
학위논문 학위논문(석사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 52-53
주제 Lasers.
Electromagnetic waves --Polarization.
안정성. --과학기술용어시소러스
레이저. --과학기술용어시소러스
표면. --과학기술용어시소러스
편광. --과학기술용어시소러스
Stability.
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