KR850002707A - Light emitting device and optical signal processing device using the same - Google Patents

Light emitting device and optical signal processing device using the same Download PDF

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Publication number
KR850002707A
KR850002707A KR1019840004527A KR840004527A KR850002707A KR 850002707 A KR850002707 A KR 850002707A KR 1019840004527 A KR1019840004527 A KR 1019840004527A KR 840004527 A KR840004527 A KR 840004527A KR 850002707 A KR850002707 A KR 850002707A
Authority
KR
South Korea
Prior art keywords
light emitting
emitting element
signal
current
laser
Prior art date
Application number
KR1019840004527A
Other languages
Korean (ko)
Inventor
다게오 다가하시 (외 3)
Original Assignee
미쓰다 가쓰시게
가부시기 가이샤 히다찌 세이사꾸쇼
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 미쓰다 가쓰시게, 가부시기 가이샤 히다찌 세이사꾸쇼 filed Critical 미쓰다 가쓰시게
Publication of KR850002707A publication Critical patent/KR850002707A/en

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Classifications

    • 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
    • H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
    • 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
    • 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
    • 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
    • H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
    • H01S5/06209—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes in single-section lasers
    • H01S5/06216—Pulse modulation or generation
    • 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
    • H01S5/065—Mode locking; Mode suppression; Mode selection ; Self pulsating
    • H01S5/0651—Mode control
    • H01S5/0652—Coherence lowering or collapse, e.g. multimode emission by additional input or modulation
    • 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
    • H01S5/065—Mode locking; Mode suppression; Mode selection ; Self pulsating
    • H01S5/0658—Self-pulsating

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optical Head (AREA)
  • Semiconductor Lasers (AREA)

Abstract

내용 없음No content

Description

발광장치 및 이것을 사용한 광학적 신호 처리 장치Light emitting device and optical signal processing device using the same

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

제5도는 본 발명의 1실시예인 발광장치의 사시도. 제6도는 제5도에 도시한 발광장치의 X-X´에 따른 모식적 단면도. 제7도는 제5도에 도시한 발광장치를 사용한 광학적 신호처리장치의 개요를 모식적으로 도시한 도면.5 is a perspective view of a light emitting device according to an embodiment of the present invention. 6 is a schematic cross-sectional view taken along line X-X 'of the light emitting device shown in FIG. FIG. 7 is a diagram schematically showing an outline of an optical signal processing apparatus using the light emitting device shown in FIG.

Claims (8)

다음 사항을 포함하는 발광장치.Light emitting device comprising: (1) 레이저광을 출사하는 발광소자, (2) 직류전류 발생수단, (3)발광소자의 공진주파수의 1/2배이상 2배 이하의 주파수의 교류성분을 포함하는 신호를 발생하는 수단, (4) 직류전류 발생수단에서 얻어지는 직류전류에 발광소자의 공진주파수의 1/2배이상, 2배이하의 주파수의 교류성분을 포함하는 신호를 중첩하고, 그 최고전류치가 발광소자의 레이저 발진 스렛쉬 홀드 수치보다 크게 되고, 그 최저 전류치가 레이저 소자의 발진스렛쉬 홀드 전류보다 적게 되는 발광소자 구동신호를 발생하는 수단.(1) a light emitting element for emitting laser light, (2) a DC current generating means, (3) a means for generating a signal containing an AC component having a frequency of 1/2 to 2 times the resonance frequency of the light emitting element, (4) A signal containing an AC component having a frequency of 1/2 or more and 2 times or less of the resonance frequency of the light emitting element is superimposed on the DC current obtained by the DC current generating means, and the maximum current value is the laser oscillation of the light emitting element. Means for generating a light emitting element drive signal which is larger than the threshold value and whose minimum current value is smaller than the oscillation threshold hold current of the laser element. 특허청구의 범위 제1항에 있어서, 발광소자는 반도체 레이저이다.The method of claim 1, wherein the light emitting element is a semiconductor laser. 특허청구의 범위 제1항에 있어서, 발광소자, 직류전류 발생수단과, 교류성분을 포함하는 신호를 발생하는 수단과, 발광소자 구동신호 발생수단과는 일체화된 패캐이지내에 구비되어 있다.The device according to claim 1, wherein the light emitting element, the DC current generating means, the means for generating a signal containing an alternating current component, and the light emitting element driving signal generating means are provided in an integrated package. 다음 사항을 포함하는 광학적 신호처리 장치.Optical signal processing device comprising the following. (1) 다음의 것을 구비하는 발광장치, (2) 레이저광을 출사하는 발광소자, (3) 직류전류 발생수단, (4) 발광소자의 공진주파수의 1/2배 이상, 2배 이하의 주파수의 교류성분을 포함하는 신호를 발생하는 수단, (5) 직류전류 발생수단에서 얻어지는 직류전류에 발광소자의 공진주파수의 1/2배 이상, 2배이하의 주파수의 교류성분을 포함하는 신호을 중첩하고, 그 최고전류치가 발광소자의 레이저발진 스렛쉬 홀드 전류보다 크게 되고, 그 최저 전류치가 레이저 소자의 발진스렛쉬 홀드 전류보다 적게 되는 발광소자 구동신호를 발생하는 수단, (6) 신호를 기록하기 위한 매체, (7) 상기 레이저를 사용해서 상기 매체에 기록된 신호를 광학적으로 검출하는 수단.(1) A light emitting device comprising: (2) a light emitting element for emitting laser light; (3) a direct current generating means; (4) a frequency not less than 1/2 or more than 2 times the resonant frequency of the light emitting element. Means for generating a signal comprising an alternating current component of (5) superimposing a signal containing an alternating current component having a frequency of at least 1/2 times and less than 2 times the resonant frequency of the light emitting element on the direct current obtained by the direct current generation means; Means for generating a light emitting element drive signal in which the highest current value is larger than the laser oscillation threshold hold current of the light emitting element and the lowest current value is smaller than the oscillation threshold hold current of the laser element, (6) for recording a signal Medium, (7) means for optically detecting a signal recorded on the medium using the laser. 특허청구의 범위 제4항에 있어서, 신호가 기록된 매체는 디지탈신호가 기록된 디스크이다.The medium in which a signal is recorded is a disk in which a digital signal is recorded. 특허청구의 범위 제4항에 있어서, 매체에 기록된 신호를 광학적으로 검출하는 수단은 커프링 렌즈(26), 편광프리즘(27), 1/4 파장판(28), 대물렌즈(29), 시린드리컬 렌즈(32)를 구비한다.The method of claim 4, wherein the means for optically detecting a signal recorded on the medium includes a cuff lens 26, a polarizing prism 27, a quarter wave plate 28, an objective lens 29, A cylindrical lens 32 is provided. 특허청구의 범위 제4항에 있어서, 발광소자는 반도체 레이저이다.The light emitting device according to claim 4 is a semiconductor laser. 특허청구의 범위 제4항에 있어서, 레이저광을 사용해서 신호를 매체에 기록시키는 수단을 구비한다.The scope of claim 4 is provided with means for recording a signal on a medium using a laser beam. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019840004527A 1983-08-08 1984-07-30 Light emitting device and optical signal processing device using the same KR850002707A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP58143879A JPS6035344A (en) 1983-08-08 1983-08-08 Light emitting device and optical signal processor using light emitting device
JP58-143879 1983-08-08

Publications (1)

Publication Number Publication Date
KR850002707A true KR850002707A (en) 1985-05-15

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ID=15349136

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019840004527A KR850002707A (en) 1983-08-08 1984-07-30 Light emitting device and optical signal processing device using the same

Country Status (6)

Country Link
JP (1) JPS6035344A (en)
KR (1) KR850002707A (en)
DE (1) DE3429255A1 (en)
FR (1) FR2550645A1 (en)
GB (1) GB2144912B (en)
IT (1) IT1176571B (en)

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Also Published As

Publication number Publication date
IT8422244A0 (en) 1984-08-07
DE3429255A1 (en) 1985-02-28
JPS6035344A (en) 1985-02-23
FR2550645A1 (en) 1985-02-15
GB2144912A (en) 1985-03-13
GB8420060D0 (en) 1984-09-12
IT1176571B (en) 1987-08-18
GB2144912B (en) 1987-12-31

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