JPS5785281A - Fixing system for oscillation wavelength of semiconductor laser by diffraction grating - Google Patents

Fixing system for oscillation wavelength of semiconductor laser by diffraction grating

Info

Publication number
JPS5785281A
JPS5785281A JP16226980A JP16226980A JPS5785281A JP S5785281 A JPS5785281 A JP S5785281A JP 16226980 A JP16226980 A JP 16226980A JP 16226980 A JP16226980 A JP 16226980A JP S5785281 A JPS5785281 A JP S5785281A
Authority
JP
Japan
Prior art keywords
semiconductor laser
diffraction grating
laser
rays
diffraction
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP16226980A
Other languages
Japanese (ja)
Inventor
Takumi Tomijima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP16226980A priority Critical patent/JPS5785281A/en
Publication of JPS5785281A publication Critical patent/JPS5785281A/en
Pending legal-status Critical Current

Links

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
    • H01S5/00—Semiconductor lasers
    • H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
    • H01S5/14—External cavity lasers
    • H01S5/141—External cavity lasers using a wavelength selective device, e.g. a grating or etalon

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)

Abstract

PURPOSE:To select oscillation wavelength continuously while ignoring the change of oscillation intensity by forming a reflection preventive film on an end surface at the diffraction grating side of the semiconductor laser. CONSTITUTION:Rays emitted by an active layer 1 of the semiconductor laser are changed into parallel rays by means of a collimator 5, and projected to the diffraction grating 6, diffraction rays having lambda0 wavelength are fed back to the active layer 1 of the semiconductor laser again by means of the collimator 5, and the oscillation wavelength of the semiconductor laser is fixed at lambda0. The reflection preventive film 3 is formed onto the end surface 2 at the diffraction grating side of the semiconductor laser, laser action only by a semiconductor laser proper is prevented or the laser action is minimized extremely even when the laser action is conducted, and laser oscillation generated only by the diffraction rays of the diffraction grating 6 or almost by the diffraction rays is conducted.
JP16226980A 1980-11-17 1980-11-17 Fixing system for oscillation wavelength of semiconductor laser by diffraction grating Pending JPS5785281A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16226980A JPS5785281A (en) 1980-11-17 1980-11-17 Fixing system for oscillation wavelength of semiconductor laser by diffraction grating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16226980A JPS5785281A (en) 1980-11-17 1980-11-17 Fixing system for oscillation wavelength of semiconductor laser by diffraction grating

Publications (1)

Publication Number Publication Date
JPS5785281A true JPS5785281A (en) 1982-05-27

Family

ID=15751240

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16226980A Pending JPS5785281A (en) 1980-11-17 1980-11-17 Fixing system for oscillation wavelength of semiconductor laser by diffraction grating

Country Status (1)

Country Link
JP (1) JPS5785281A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0240293A2 (en) * 1986-03-31 1987-10-07 Matsushita Electric Industrial Co., Ltd. Frequency stabilized light source
EP0500357A2 (en) * 1991-02-19 1992-08-26 Nec Corporation Optical fiber dispersion-compensating device
EP0924821A1 (en) * 1997-12-18 1999-06-23 Nec Corporation External mirror type wavelength tunable laser

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0240293A2 (en) * 1986-03-31 1987-10-07 Matsushita Electric Industrial Co., Ltd. Frequency stabilized light source
EP0500357A2 (en) * 1991-02-19 1992-08-26 Nec Corporation Optical fiber dispersion-compensating device
US5243610A (en) * 1991-02-19 1993-09-07 Nec Corporation Optical fiber dispersion-compensating device
EP0924821A1 (en) * 1997-12-18 1999-06-23 Nec Corporation External mirror type wavelength tunable laser

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