JPS647588A - Light amplifier - Google Patents

Light amplifier

Info

Publication number
JPS647588A
JPS647588A JP16187187A JP16187187A JPS647588A JP S647588 A JPS647588 A JP S647588A JP 16187187 A JP16187187 A JP 16187187A JP 16187187 A JP16187187 A JP 16187187A JP S647588 A JPS647588 A JP S647588A
Authority
JP
Japan
Prior art keywords
active layer
current
light
noise
amplified
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
JP16187187A
Other languages
Japanese (ja)
Other versions
JP2716125B2 (en
Inventor
Masahiko Fujiwara
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP16187187A priority Critical patent/JP2716125B2/en
Publication of JPS647588A publication Critical patent/JPS647588A/en
Application granted granted Critical
Publication of JP2716125B2 publication Critical patent/JP2716125B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H01S5/50—Amplifier structures not provided for in groups H01S5/02 - H01S5/30
    • 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
    • H01S5/0601—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium comprising an absorbing region

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)
  • Semiconductor Lasers (AREA)
  • Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)

Abstract

PURPOSE:To obtain superior noise characteristics by putting a saturable absorber in a part of region at least among optical axes of a resonator. CONSTITUTION:Signal light 19 comes to an incident and 17a and is connected to an active layer 12. Then, once a current flows in the layer 12 by applying a forward bias voltage between electrodes 15a and 16, gain takes place in the active layer 12 according to the number of injected carriers. While being amplified, the incident light 19 proceeds towards an outgoing end 17b and simultaneously with its proceeding, spontaneous emission light, namely, the cause of the noise is also amplified. On the other hand, as the electrodes 15b and 15a are electrically isolated, the current can be inputted towards 15b independently of the electrode 15a and when the current does not flow in this part 15b at all or its current at an extremely low excitation level is applied, the active layer right below the electrode 15b acts as a saturable absorber. Thus, such a state of the active layer enables light input/output characteristics to have a threshold property. In this way, a larger amount of the signal lights having a higher light power level are so permeable that spontaneous emission lights acting as a noise source are removed.
JP16187187A 1987-06-29 1987-06-29 Optical amplifier Expired - Fee Related JP2716125B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16187187A JP2716125B2 (en) 1987-06-29 1987-06-29 Optical amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16187187A JP2716125B2 (en) 1987-06-29 1987-06-29 Optical amplifier

Publications (2)

Publication Number Publication Date
JPS647588A true JPS647588A (en) 1989-01-11
JP2716125B2 JP2716125B2 (en) 1998-02-18

Family

ID=15743554

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16187187A Expired - Fee Related JP2716125B2 (en) 1987-06-29 1987-06-29 Optical amplifier

Country Status (1)

Country Link
JP (1) JP2716125B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0572591A (en) * 1991-09-17 1993-03-26 Nippon Telegr & Teleph Corp <Ntt> Optical loop memory
KR100353419B1 (en) * 2000-03-10 2002-09-18 삼성전자 주식회사 Polarization insensitive semiconductor optical amplifier
JP2005214986A (en) * 2005-03-15 2005-08-11 Anritsu Corp Optical memory

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5555638A (en) * 1978-10-19 1980-04-23 Kokusai Denshin Denwa Co Ltd <Kdd> Semiconductor optical pulse reproducing and relay unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5555638A (en) * 1978-10-19 1980-04-23 Kokusai Denshin Denwa Co Ltd <Kdd> Semiconductor optical pulse reproducing and relay unit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0572591A (en) * 1991-09-17 1993-03-26 Nippon Telegr & Teleph Corp <Ntt> Optical loop memory
KR100353419B1 (en) * 2000-03-10 2002-09-18 삼성전자 주식회사 Polarization insensitive semiconductor optical amplifier
JP2005214986A (en) * 2005-03-15 2005-08-11 Anritsu Corp Optical memory

Also Published As

Publication number Publication date
JP2716125B2 (en) 1998-02-18

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees