JPS6490407A - Diffraction grating - Google Patents

Diffraction grating

Info

Publication number
JPS6490407A
JPS6490407A JP62248441A JP24844187A JPS6490407A JP S6490407 A JPS6490407 A JP S6490407A JP 62248441 A JP62248441 A JP 62248441A JP 24844187 A JP24844187 A JP 24844187A JP S6490407 A JPS6490407 A JP S6490407A
Authority
JP
Japan
Prior art keywords
layers
diffraction grating
exposed
light
refractive index
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.)
Granted
Application number
JP62248441A
Other languages
Japanese (ja)
Other versions
JPH0830763B2 (en
Inventor
Takashi Murakami
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP62248441A priority Critical patent/JPH0830763B2/en
Publication of JPS6490407A publication Critical patent/JPS6490407A/en
Publication of JPH0830763B2 publication Critical patent/JPH0830763B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01S5/12—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 the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers
    • H01S5/125—Distributed Bragg reflector [DBR] lasers
    • 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
    • H01S5/12—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 the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Optical Integrated Circuits (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)

Abstract

PURPOSE:To realize a diffraction grating which has a flat surface applicable to a semiconductor laser by providing the sections exposed with plural layers of different refractive indices formed periodically on a substrate as a surface. CONSTITUTION:The sections of the layers 2, 3 grown to multiple layers by alternately growing the crystals of AlxGa1-xAs layers 2 and AlyGa1-yAs layers 3 on the flat GaAs substrate 1, then subjecting the layers to diagonal polishing are exposed on the surface. Part of incident light penetrates from the surface into the layers 2 and 3 when the incident light enters the diagonally polished surface in parallel therewith. Said light is, therefore, reflected near the part where the refractive index changes, i.e., the boundary faces of the layers 2 and the layers 3. Since the refractive index changes periodically, the Bragg reflections by which the phases of the reflected light are unified are generated and the diffracted light is obtd. This diffraction grating has the flat surface and, therefore, the thermal decomposition of the diffraction grating and the collapse of the rugged shape and the consequent annihilation of the diffraction grating are obviated even when exposed to a high temp.
JP62248441A 1987-10-01 1987-10-01 Diffraction grating Expired - Lifetime JPH0830763B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62248441A JPH0830763B2 (en) 1987-10-01 1987-10-01 Diffraction grating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62248441A JPH0830763B2 (en) 1987-10-01 1987-10-01 Diffraction grating

Publications (2)

Publication Number Publication Date
JPS6490407A true JPS6490407A (en) 1989-04-06
JPH0830763B2 JPH0830763B2 (en) 1996-03-27

Family

ID=17178173

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62248441A Expired - Lifetime JPH0830763B2 (en) 1987-10-01 1987-10-01 Diffraction grating

Country Status (1)

Country Link
JP (1) JPH0830763B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5187841A (en) * 1991-06-03 1993-02-23 Yoshida Kogyo K. K. Pull tab for slide fastener

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54106525A (en) * 1978-02-09 1979-08-21 Nippon Electric Co Fabricating dielectric diffraction grating
JPS622207A (en) * 1985-06-28 1987-01-08 Hitachi Ltd Diffraction grating and its production

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54106525A (en) * 1978-02-09 1979-08-21 Nippon Electric Co Fabricating dielectric diffraction grating
JPS622207A (en) * 1985-06-28 1987-01-08 Hitachi Ltd Diffraction grating and its production

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5187841A (en) * 1991-06-03 1993-02-23 Yoshida Kogyo K. K. Pull tab for slide fastener

Also Published As

Publication number Publication date
JPH0830763B2 (en) 1996-03-27

Similar Documents

Publication Publication Date Title
Soref et al. All-silicon active and passive guided-wave components for λ= 1.3 and 1.6 µm
Ng et al. Holographic interference lithography for integrated optics
EP0206220B1 (en) Higher harmonic generator
KR19990022008A (en) DF laser diode structure with complex optical diffraction grating coupling
EP0450668A3 (en) Semiconductor laser array having power and high beam quality
GB2231167A (en) Electro-optic waveguide device
EP0263640B1 (en) Interlayer directional coupling in antiresonant reflecting optical waveguides
GB1394870A (en) Optical waveguides
DE68910369D1 (en) Phase-locked semiconductor laser array using closely spaced negative refractive index waveguides.
EP0311445A3 (en) A semiconductor laser device and a method for the production of the same
JPS5511310A (en) Semiconductor laser element
DE3876109D1 (en) MONOLITHICALLY INTEGRATED WAVE WIRE PHOTODIODE COMBINATION.
JPS6490407A (en) Diffraction grating
GB2167898A (en) A semiconductor laser
JPS5642386A (en) Semiconductor photodetector
EP0138567A3 (en) Semiconductor diode lasers
JPS5715465A (en) Large scale optical integrated circuit
JPS6425494A (en) Semiconductor laser device and manufacture thereof
JPH02143581A (en) Semiconductor laser element
JPS5727091A (en) Wavelength variable semiconductor laser
JPS5712585A (en) Semiconductor laser
JPS5591890A (en) Photodiode
JPS5522807A (en) Semiconductor laser element and manufacturing of the same
JPS5680195A (en) Semiconductor laser device
François et al. Polarization-independent filtering in a grating-assisted horizontal directional coupler