KR960015449A - Optical output control device of surface emitting laser and optical pickup for recording and reproduction using same - Google Patents

Optical output control device of surface emitting laser and optical pickup for recording and reproduction using same Download PDF

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Publication number
KR960015449A
KR960015449A KR1019940028383A KR19940028383A KR960015449A KR 960015449 A KR960015449 A KR 960015449A KR 1019940028383 A KR1019940028383 A KR 1019940028383A KR 19940028383 A KR19940028383 A KR 19940028383A KR 960015449 A KR960015449 A KR 960015449A
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KR
South Korea
Prior art keywords
light
emitting laser
photodetector
half mirror
recording
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KR1019940028383A
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Korean (ko)
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KR0138341B1 (en
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문종국
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김광호
삼성전자 주식회사
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Priority to KR1019940028383A priority Critical patent/KR0138341B1/en
Publication of KR960015449A publication Critical patent/KR960015449A/en
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Publication of KR0138341B1 publication Critical patent/KR0138341B1/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Head (AREA)

Abstract

표면 발광 레이저의 광출력 검출장치와 이를 이용한 기록 재생용 광픽업이 개시되어 있다.An apparatus for detecting light output of a surface-emitting laser and an optical pickup for recording and reproducing using the same are disclosed.

이 표면 발광 레이저의 광출력 검출장치는 상기 표면 발광 레이저의 전방에 설치되어 그로부터 방사된 광의 일부를 투과시키고 나머지 일부는 반사시키는 하프미러와, 상기 표면 발광 레이저의 하단부에 설치되어 상기 하프미러에 의하여 반사되는 광을 수광하는 모니터용 광검출기를 구비하여, 상기 모니터용 광검출기의 출력을 근거로 하여 상기 표면 발광레이저의 광출력 정도를 제어하도록 되어 있다,The light output detection device of the surface-emitting laser is provided with a half mirror installed in front of the surface-emitting laser to transmit a part of the light emitted therefrom, and reflecting the remaining part of the surface-emitting laser. A monitor photodetector for receiving the reflected light is provided to control the degree of light output of the surface-emitting laser based on the output of the monitor photodetector.

또한, 이 표면 발광 레이저의 광출력 제어장치를 이용한 기록재생용 광픽업은. 상기 광출력 제어수단이 상기 표면 발광 레이저의 전방에 설치되어 그로부터 방사된 광의 일부를 투과시키고 나머지 일부를 반사시키는 하프미러와, 상기 표면 발광 레이저의 하부에 설치되어 상기 하프미러에 의하여 반사되는 광을 수광하는 모니터용 제1광검출기를 구비하고, 상기 하프미러를 투과하는 광을 광기록 매체에 집속되는 대물렌즈와, 상기 광기록 재생 매체의 반사광을 수광하여 전기적 신호롤 검출하는 제2광검출기를 구비하여 된다.In addition, the optical pickup for recording and reproduction using the light output control device of the surface-emitting laser. The light output control means is installed in front of the surface-emitting laser to transmit a part of the light emitted from the reflecting half mirror, and the light is installed under the surface-emitting laser and reflected by the half mirror A first photodetector for receiving light, an objective lens for focusing the light passing through the half mirror on the optical recording medium, and a second photodetector for receiving the reflected light from the optical recording / reproducing medium to detect electrical signals. It is provided.

Description

표면 발광 레이저의 광출력 제어장치와 이를 이용한 기록재생용 광픽업Optical output control device of surface emitting laser and optical pickup for recording and reproduction using same

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제4도는 본 발명에 따른 표면 발광 레이저의 광출력 제어장치의 일실시예를 나타낸 사시도,Figure 4 is a perspective view showing an embodiment of the light output control device of the surface-emitting laser according to the present invention,

제5도는 본 발명에 따른 표면 발광 레이저의 광출력 제어장치를 이용한 기록재생용 광픽업의 일 실시예를 나타낸 개략도.5 is a schematic diagram showing an embodiment of the optical pickup for recording and reproducing using the light output control apparatus of the surface-emitting laser according to the present invention.

Claims (4)

광발생면을 가지며, 이 광발생면에 수직한 방향으로 광을 방사하는 표면 발광 레이저의 광출력 제어장치에 있어서, 상기 표면 발광 레이저의 전방에 설치되어 그로부터 방사된 광의 일부를 투과시키고 나머지 일부는 반사시키는 하프미러와, 상기 표면 발광 레이저의 하단부에 설치되어, 상기 하프미러에 의하여 반사되는 광을 수광하는 모니터용 광검출기를 구비하여, 상기 모니터용 광검출기의 출력을 근거로하여 상기 표면 발광레이저의 광출력 정도를 제어하도록 된 것을 특징으로 하는 표면 발광 레이저의 광출력 검출장치.A light output control apparatus of a surface-emitting laser that has a light generating surface and emits light in a direction perpendicular to the light generating surface, wherein the light emitting control device is installed in front of the surface emitting laser to transmit a part of the light emitted therefrom, A half mirror for reflecting and a photodetector for monitoring provided at a lower end of the surface-emitting laser and receiving light reflected by the half mirror, wherein the surface-emitting laser is based on an output of the monitor photodetector. Light output detection device of the surface-emitting laser, characterized in that for controlling the degree of light output. 광발생면을 가지며 이 광발생면에 수직한 방향으로 광을 방사하는 표면 발광 레이저의 광출력 제어수단을 포함하는 기록재생용 광픽업에 있어서, 상기 광출력 제어수단이 상기 표면 발광 레이저의 전방에 설치되어 그로부터 방사원 광의 일부를 투과시키고 나머지 일부를 반사시키는 하프미러와, 상기 표면 발광 레이저의 하부에 설치돠어 상기 하프미러에 의하여 반사되는 광을 수광하는 모니터용 제1광검출기를 구비하고, 상기 하프미러를 투과하는 광을 광기록 매체에 집속하는 대물렌즈와, 상기 광기록 재생 매체의 반사광을 수광하여 전기적 신호를 검출하는 제2광검출기를 구비하여 된 것을 특징으로 하는 기록 재생용 광픽업.A recording and reproducing optical pickup comprising a light output control means for a surface emitting laser that has a light generating surface and emits light in a direction perpendicular to the light generating surface, wherein the light output control means is placed in front of the surface emitting laser. A half mirror installed to transmit a portion of the radiation source light therefrom and reflecting the remaining portion thereof; And an objective lens for focusing the light passing through the mirror onto the optical recording medium, and a second photodetector for receiving the reflected light from the optical recording and reproducing medium to detect an electrical signal. 제2항에 있어서, 상기 제2광검출기가 상기 표면 발광 레이저의 하단부에 설치되고 상기 표면 발광 레이저와 대물렌즈 사이에 배치되어 상기 반사광을 그 제2광검출기쪽으로 회절 및 집속시키는 홀로그램소자가 더 구비된 것을 특징으로 하는 기록 재생용 광픽업.3. The holographic device of claim 2, further comprising a hologram element disposed at a lower end of the surface emitting laser and disposed between the surface emitting laser and the objective lens to diffract and focus the reflected light toward the second photodetector. The optical pickup for recording and reproducing, characterized in that. 제2항에 있어서, 상기 제2광검출기가 상기 표면 발광 레이저의 하단부에 설치되고 일측면에 코팅된 하프미러를 가지며 상기 표면 발광 레이저와 대물렌즈 사이에 배치되어 그 표면 발광 레이저의 광의 일부를 상기 대물렌즈쪽으로 투과시키고 그 나머지의 광을 상기 모니터용 제1광검출기쪽으로 반사시키는 동시에 상기 반사광을 상기 광검출기쪽으로 회절 및 집속시키는 홀로그램소자가 더 구비된 것을 특징으로 하는 기록 재생용 광픽업.3. The light emitting device of claim 2, wherein the second photodetector is installed at a lower end of the surface emitting laser, has a half mirror coated on one side, and is disposed between the surface emitting laser and the objective lens to partially cover the light of the surface emitting laser. And a hologram element which transmits toward the objective lens and reflects the rest of the light toward the monitor first photodetector and diffracts and focuses the reflected light toward the photodetector. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940028383A 1994-10-31 1994-10-31 An optical output controller of a surface optical laser and a recording/reproducing optical pick up KR0138341B1 (en)

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Application Number Priority Date Filing Date Title
KR1019940028383A KR0138341B1 (en) 1994-10-31 1994-10-31 An optical output controller of a surface optical laser and a recording/reproducing optical pick up

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Application Number Priority Date Filing Date Title
KR1019940028383A KR0138341B1 (en) 1994-10-31 1994-10-31 An optical output controller of a surface optical laser and a recording/reproducing optical pick up

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KR960015449A true KR960015449A (en) 1996-05-22
KR0138341B1 KR0138341B1 (en) 1998-05-15

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