WO2003043149B1 - Electronically tunable laser using wavelength selective reflectors - Google Patents

Electronically tunable laser using wavelength selective reflectors

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Publication number
WO2003043149B1
WO2003043149B1 PCT/CA2002/001751 CA0201751W WO03043149B1 WO 2003043149 B1 WO2003043149 B1 WO 2003043149B1 CA 0201751 W CA0201751 W CA 0201751W WO 03043149 B1 WO03043149 B1 WO 03043149B1
Authority
WO
WIPO (PCT)
Prior art keywords
gain medium
pulses
wavelengths
waveguide
time
Prior art date
Application number
PCT/CA2002/001751
Other languages
French (fr)
Other versions
WO2003043149A1 (en
Inventor
Michel A Duguay
Sophie Larochelle
Etienne Grondin
Geoffroy Deltel
Original Assignee
Univ Laval
Michel A Duguay
Sophie Larochelle
Etienne Grondin
Geoffroy Deltel
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 Univ Laval, Michel A Duguay, Sophie Larochelle, Etienne Grondin, Geoffroy Deltel filed Critical Univ Laval
Publication of WO2003043149A1 publication Critical patent/WO2003043149A1/en
Publication of WO2003043149B1 publication Critical patent/WO2003043149B1/en

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
    • H01S5/146—External cavity lasers using a fiber as external cavity
    • 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
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H01S3/06791—Fibre ring 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/08—Construction or shape of optical resonators or components thereof
    • H01S3/08086—Multiple-wavelength emission
    • 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
    • H01S3/10038—Amplitude control
    • H01S3/10046—Pulse repetition rate control
    • 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
    • H01S3/107—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 electro-optic devices, e.g. exhibiting Pockels or Kerr effect
    • 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
    • H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
    • H01S3/1106—Mode locking
    • H01S3/1109—Active mode locking
    • 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
    • H01S5/0657—Mode locking, i.e. generation of pulses at a frequency corresponding to a roundtrip in the cavity

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Lasers (AREA)
  • Optical Communication System (AREA)

Abstract

A laser cavity for generating a train of laser pulses at a selected wavelength comprises a gain medium (100); an input pulse generator for gating on an effective gain of the cavity, the generator generating pairs of pulses with a time tsel between the pulses and a time T between the pairs of pulses; a first and a second set of distributed wavelength selective reflectors (101,102) on each side of the gain medium (100), each of the reflections being spaced apart in time; the second (102) set being paired with the first set (101) wherein the pairing ensures that a total cavity round-trip delay of T is equal for all wavelengths; a delay modifier for adjusting the time tsel between the pulses and selecting a wavelength; and an output; whereby the output repetition rate of the train of laser pulses can be equal for all wavelengths reflected by the first and second sets.

Claims

36AMENDED CLAIMS[Received by the International Bureau on 28 April 2003 (28.04.03): original claims 1-14 replaced by amended claims 1-17]WHAT IS CLAIMED IS:
1. A laser cavity for generating a train of laser pulses at a selected wavelength from a plurality of wavelengths, comprising: a gain medium generating light having a plurality of wavelengths from pump energy; an input pulse generator for gating on an effective gain of said cavity, said input pulse generator generating pairs of input pulses with a time tse| between the input pulses of said pairs and a time T between the pairs of input pulses; on a first side of the gain medium, a first waveguide coupled to said gain medium; on a second side of the gain medium, a second waveguide coupled to said gain medium; on the first waveguide, a first set of distributed wavelength selective reflectors, each reflector of said first set reflecting light at one of said plurality of wavelengths, each of said reflections being spaced apart in time; on the second waveguide, a second set of distributed wavelength selective reflectors, each reflector of said second set reflecting light at one of said plurality of wavelengths, each of said reflections being spaced apart in time and being paired with a corresponding one of said reflectors from said first set reflecting light at a same one of said plurality of wavelengths; wherein said pairing is adapted to ensure that a total cavity round-trip delay of substantially T is substantially equal for all wavelengths reflected by said first and second sets; a delay modifier for adjusting the time tse| between the pulses of said pairs and thereby selecting a selected wavelength for the train of laser pulses; an output for outputtiπg the train of laser pulses at the selected wavelength; whereby the output repetition rate of the train of laser pulses is substantially equal for all wavelengths reflected by said first and second sets. 37
2. A laser cavity as claimed in claim 1, wherein said reflectors are Bragg gratings.
3. A laser cavity as claimed in claim 1, wherein at least one of said first set and said second set of reflectors is at least one of a chirped grating and a set of chirped gratings.
4. A laser cavity as claimed in claim 1 , wherein said input pulse generator gates on an electro-optic gate placed between said gain medium and one of said first and said second set of wavelength selective reflectors.
5. A laser cavity as claimed in claim 1, wherein said first set and said second set share a common set of reflectors; an end of said first waveguide furthest from said gain medium is coupled to an end of said second waveguide nearest to said gain medium, a furthest reflector of said first set from said gain medium being a closest reflector of said second set from said gain medium; said output is an optical coupler; whereby said laser cavity is a pseudo-ring laser cavity.
6. A laser cavity as claimed in claim 1, wherein said input pulses have subnanosecond duration.
7. A telecommunications optical input for generating a signal to be transmitted on a transmission link, comprising: an input for receiving a data signal to be transmitted on said transmission link at a selected wavelength; a gain medium generating light having a plurality of wavelengths from pump energy; an input pulse generator for gating on an effective gain of said cavity, said input pulse generator generating pairs of input pulses with a time tSΘ| between the input pulses of said pairs and a time T between the pairs of input pulses; on a first side of the gain medium, a first waveguide coupled to said gain medium; on a second side of the gain medium, a second waveguide coupled to said gain medium; on the first waveguide, a first set of distributed wavelength selective reflectors, each reflector of said first set reflecting light at one of said plurality of wavelengths, each of said reflections being spaced apart in time; on the second waveguide, a second set of distributed wavelength selective reflectors, each reflector of said second set reflecting light at one of said plurality of wavelengths, each of said reflections being spaced apart in time and being paired with a corresponding one of said reflectors from said first set reflecting light at a same one of said plurality of wavelengths; wherein said pairing is adapted to ensure that a total cavity round-trip delay of substantially T is substantially equal for all wavelengths reflected by said first and second sets; a delay modifier for adjusting the time tse| between the pulses of said pairs and thereby selecting said selected wavelength for a train of laser pulses to be generated; an output for outputting the train of laser pulses at the selected wavelength; a modulator for modulating said train of laser pulses; an output of said modulated being coupled to said transmission link for transmission; whereby the output frequency of the train of laser pulses is substantially equal for all wavelengths reflected by said first and second sets.
8. A method for generating a train of laser pulses at a selected wavelength from a 39
plurality of wavelengths, comprising: generating light having a plurality of wavelengths by a gain medium using pump energy; gating on an effective gain of said cavity by generating pairs of input pulses with a time tse| between the input pulses of said pairs and a time T between the pairs of input pulses; on a first side of the gain medium, coupling a first waveguide to said gain medium; on a second side of the gain medium, coupling a second waveguide to said gain medium; on the first waveguide, placing a first set of distributed wavelength selective reflectors, each reflector of said first set reflecting light at one of said plurality of wavelengths, each of said reflections being spaced apart in time; on the second waveguide, placing a second set of distributed wavelength selective reflectors, each reflector of said second set reflecting light at one of said plurality of wavelengths, each of said reflections being spaced apart in time and being paired with a corresponding one of said reflectors from said first set reflecting light at a same one of said plurality of wavelengths; wherein said pairing is adapted to ensure that a total cavity round-trip delay of substantially T is substantially equal for all wavelengths reflected by said first and second sets; adjusting the time tse| between the pulses of said pairs and thereby selecting a selected wavelength for the train of laser pulses; outputting the train of laser pulses at the selected wavelength; whereby the output repetition rate of the train of laser pulses is substantially equal for all wavelengths reflected by said first and second sets,
9. A method as claimed in claim 8, wherein said reflectors are Bragg gratings. 40
10. A method as claimed in claim 8, wherein at least one of said first set and said second set of reflectors is a chirped grating.
11. A method as claimed in claim 8, wherein at least one of said first set and said second set is a set of chirped gratings.
12. A method as claimed in claim 8, wherein said first set and said second set share a common set of reflectors; an end of said first waveguide furthest from said gain medium is coupled to an end of said second waveguide nearest to said gain medium, a furthest reflector of said first set from said gain medium being a closest reflector of said second set from said gain medium; said output is an optical coupler; whereby said laser cavity is a pseudo-ring laser cavity.
13. A laser cavity as claimed in claim 8, wherein said input pulses have subnanosecond duration.
14. A method for generating a signal to be transmitted on a transmission link, comprising: an input for receiving a data signal to be transmitted on said transmission link at a selected wavelength; generating light having a plurality of wavelengths by a gain medium using pump energy; gating on the gain medium with pump energy, said pump energy being generated using pairs of input pulses with a time tsej between the input pulses of said pairs and a time T between the pairs of input pulses; on a first side of the gain medium, coupling a first waveguide to said gain 41
medium; on a second side of the gain medium, coupling a second waveguide to said gain medium; on the first waveguide, placing a first set of distributed wavelength selective reflectors, each reflector of said first set reflecting light at one of said plurality of wavelengths, each of said reflections being spaced apart in time; on the second waveguide, placing a second set of distributed wavelength selective reflectors, each reflector of said second set reflecting light at one of said plurality of wavelengths, each of said reflections being spaced apart in time and being paired with a corresponding one of said reflectors from said first set reflecting light at a same one of said plurality of wavelengths; wherein said pairing is adapted to ensure that a total cavity round-trip delay of substantially T is substantially equal for all wavelengths reflected by said first and second sets; adjusting the time tse| between the pulses of said pairs and thereby selecting a selected wavelength for the train of laser pulses; outputting the train of laser pulses at the selected wavelength; modulating said train of laser pulses; an output of said modulated being coupled to said transmission link for transmission; whereby the output frequency of the train of laser pulses is substantially equal for all wavelengths reflected by said first and second sets.
15. A laser cavity as claimed in claim 1. wherein said input pulse generator gates on said gain medium placed between said first and said second set of wavelength selective reflectors.
16. A method as claimed in claim 8, wherein said gating on comprises gating on an electro-optic gate placed between said gain medium and one of said first and 42
said second set of wavelength selective reflectors.
17. A method as claimed in claim 8, wherein said gating on comprises gating on said gain medium placed between said first and said second set of wavelength selective reflectors.
PCT/CA2002/001751 2001-11-15 2002-11-15 Electronically tunable laser using wavelength selective reflectors WO2003043149A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US33141301P 2001-11-15 2001-11-15
US60/331,413 2001-11-15

Publications (2)

Publication Number Publication Date
WO2003043149A1 WO2003043149A1 (en) 2003-05-22
WO2003043149B1 true WO2003043149B1 (en) 2003-09-12

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108521065A (en) * 2018-04-19 2018-09-11 武汉安扬激光技术有限责任公司 A kind of all -fiber annular laser with active-passive lock mould

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2183829A4 (en) * 2007-08-09 2014-06-18 Alain Villeneuve Tunable mode-locked laser
CA2927868A1 (en) 2013-10-21 2015-04-30 Genia Photonics Inc. Synchronized tunable mode-locked lasers
DE102015106633B4 (en) 2015-04-29 2018-05-24 Leibniz-Institut für Photonische Technologien e. V. Fiber-optic laser generator
US11233372B2 (en) 2019-06-25 2022-01-25 Lumentum Operations Llc Femtosecond pulse stretching fiber oscillator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2182999A (en) * 1998-01-30 1999-08-16 Technion Research & Development Foundation Ltd. A wavelength-selectable laser system using cavity resonance frequency, especially useful for fiber optic communication and wavelength division multiplexing
US6148011A (en) * 1998-05-01 2000-11-14 Institut National D'optique Wavelength sliced self-seeded pulsed laser
US6192058B1 (en) * 1998-09-18 2001-02-20 Sarnoff Corporation Multiwavelength actively mode-locked external cavity semiconductor laser

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108521065A (en) * 2018-04-19 2018-09-11 武汉安扬激光技术有限责任公司 A kind of all -fiber annular laser with active-passive lock mould

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