WO2009104469A1 - 波長可変光源 - Google Patents
波長可変光源 Download PDFInfo
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- WO2009104469A1 WO2009104469A1 PCT/JP2009/051733 JP2009051733W WO2009104469A1 WO 2009104469 A1 WO2009104469 A1 WO 2009104469A1 JP 2009051733 W JP2009051733 W JP 2009051733W WO 2009104469 A1 WO2009104469 A1 WO 2009104469A1
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- 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
- H01S5/0607—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying physical parameters other than the potential of the electrodes, e.g. by an electric or magnetic field, mechanical deformation, pressure, light, temperature
- H01S5/0612—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying physical parameters other than the potential of the electrodes, e.g. by an electric or magnetic field, mechanical deformation, pressure, light, temperature controlled by temperature
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- 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
- H01S3/0632—Thin film lasers in which light propagates in the plane of the thin film
- H01S3/0637—Integrated lateral waveguide, e.g. the active waveguide is integrated on a substrate made by Si on insulator technology (Si/SiO2)
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- 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
- H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
- H01S3/083—Ring lasers
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- 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
- H01S5/02—Structural details or components not essential to laser action
- H01S5/026—Monolithically integrated components, e.g. waveguides, monitoring photo-detectors, drivers
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- 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
- H01S5/1028—Coupling to elements in the cavity, e.g. coupling to waveguides adjacent the active region, e.g. forward coupled [DFC] structures
- H01S5/1032—Coupling to elements comprising an optical axis that is not aligned with the optical axis of the active region
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- 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
- H01S5/142—External cavity lasers using a wavelength selective device, e.g. a grating or etalon which comprises an additional resonator
Definitions
- the present invention is a light source used for optical communication, optical information processing, and optical interconnection, and particularly relates to a laser light source having a wavelength variable function.
- wavelength division multiplexing increases the capacity by increasing the number of wavelengths.
- wavelength resources are not only used for capacity expansion, but are also actively used for improving network functions.
- the expansion of communication capacity and the enhancement of communication system functions are mutually related, and it is possible to provide a low-cost and highly secure communication service.
- the tunable laser light source is one of important key devices.
- a wavelength tunable light source By applying a wavelength tunable light source to such a WDM system, the types of light sources can be integrated into one, so that the system cost can be greatly reduced.
- a wavelength tunable light source having a high switching speed is an indispensable element for realizing a new network function even in wavelength routing.
- Non-Patent Document 1 listed below uses a movable MEMS mirror as a variable wavelength light source that can cover the C band or the L band. Although this light source exhibits relatively good light output characteristics, its practicality is concerned in terms of manufacturing cost and impact resistance.
- the DBR laser distributed Bragg reflector Laser
- improved mode stability and further integrated with a modulator has been reported in Non-Patent Document 2 below. There is a problem.
- PLC planar lightwave circuit
- Non-patent document 3 reports a laser configuration using a ring-type external resonator and a semiconductor optical amplifier.
- a wavelength variable light source having no movable part good characteristics are obtained in terms of wavelength variable range, optical output, and the like.
- the variable range of the wavelength is limited by the FSR (Free Spectrum Range) of the ring type external resonator, that is, the resonance wavelength period.
- Non-Patent Document 1 Jill D. Berger et al., “27th European Conference on Optical Communication (ECOC '01)”, Vol.2,2001, p.198-199
- Non-Patent Document 2 B.Mason et al., “IEEE Photonics Letters”, Vol.11, No.6, June.1999, p.638-639
- Non-Patent Document 3 H. Yamazaki et al., “30th European Conference on Optical Communication”, 2004, th4.2.3
- Patent Document 1 Japanese Laid-Open Patent Publication No.
- the communication wavelength band is divided into a C band and an L band, and each wavelength band is approximately 40 nm. Many wavelength signal lights are introduced in the wavelength range.
- tunable lasers are being developed based on the 40 nm wavelength tunable range, and have a wide wavelength tunable range (80 nm or more) that can cover both the C and L bands with a single light source. There are few lasers.
- the present invention is intended to provide a wavelength tunable light source that can solve the above-described problems.
- An example of the object is to provide a wavelength tunable light source capable of greatly expanding the wavelength tunable range while having a relatively simple configuration using a planar optical circuit having no movable part.
- One embodiment of the present invention is a wavelength tunable light source capable of changing the wavelength of output laser oscillation light, and includes a 3 dB directional coupler, a closed-loop optical circuit, two or more resonators, an optical amplifier, a reflective structure, A reflective structure and a resonant wavelength changing element are provided.
- the 3 dB directional coupler has two input paths and two output paths.
- the closed loop optical circuit is formed by connecting the ends of the two output paths of the 3 dB directional coupler to each other.
- the two or more resonators are connected in cascade so as to form a part of a closed loop optical circuit, and the respective resonance wavelength periods are different.
- One end of an optical amplifier is optically connected to one input path end of the 3 dB directional coupler, and laser oscillation light is output from the other end of the optical amplifier.
- a reflection structure having a predetermined reflectance is formed at the other end of the optical amplifier.
- a non-reflective structure is formed at the other input path end of the 3 dB directional coupler.
- the wavelength tunable light source having such a configuration includes a resonance wavelength changing element that changes the resonance wavelength of at least one of the two or more resonators.
- the wavelength of the laser oscillation light can be changed by changing the resonance wavelength of the resonator.
- the present invention can have a wavelength variable range that can cover a wide band.
- the schematic diagram explaining the basic composition and effect
- Schematic which shows the transmittance
- the schematic diagram which shows the outline of the wavelength variable light source by 1st Example of this invention.
- the schematic diagram which shows the structure of the air gap mirror in Si waveguide.
- the schematic diagram which shows the wavelength dependence of the transmittance
- the schematic diagram which shows the wavelength variable light source by the 2nd Example of this invention.
- the schematic diagram which shows the structure of the optical waveguide which has a heat separation function.
- the wavelength tunable light source of the present invention is a laser light source capable of changing the oscillation wavelength of laser light to be output by electrical control.
- FIG. 1 is a schematic diagram for illustrating a basic configuration of the present invention.
- the wavelength tunable light source of the present invention includes a 3 dB directional coupler 3 (referred to as a 2 ⁇ 2 3 dB directional coupler) having two input paths and two output paths, and a 3 dB directional coupler.
- 3 constitutes a closed-loop optical circuit 5 in which two output path ends are connected to each other.
- two resonators 1 and 2 having slightly different resonance wavelength periods are connected in cascade.
- One input path end 6 of the 3 dB directional coupler 3 is connected to the optical amplifier 4, and the other input path end 7 of the 3 dB directional coupler 3 is provided with a non-reflection mechanism.
- the stimulated emission light generated from the optical amplifier 4 is branched into two at the branch portion of the 3 dB directional coupler 3, and each light wave passes through the resonator 1 and the resonator 2. Then, each of the light waves reaches the 3 dB directional coupler 3 again and is combined and returns to the optical amplifier 4.
- the light wave that does not pass through the resonator 1 and the resonator 2 returns to the 3 dB directional coupler 3 as reflected light, and is combined and emitted from one end 7 of the optical circuit 5.
- FIG. 2 schematically shows a wavelength spectrum when a light wave input from the optical amplifier 4 returns to the optical amplifier 4 again as a transmission spectrum.
- the transmission spectrum 13 shown in the figure is a combination of the transmission spectrum 11 of the resonator 1 and the transmission spectrum 12 of the resonator 2.
- the transmitted light intensity of the transmission spectrum 13 is the highest at the wavelength where the transmission spectra 11 and 12 coincide with each other, and laser oscillation occurs at this wavelength.
- the oscillation wavelength width is M ⁇ ⁇ FSR .
- variable wavelength oscillation covering the entire C band (about 32 nm) is possible.
- the resonance wavelength period ⁇ FSR can be easily expanded. That is, the resonance wavelength period ⁇ FSR can be easily expanded by reducing the length of the waveguide etalon.
- FIG. 3 is a schematic diagram showing a schematic configuration of a wavelength tunable light source according to the first embodiment of the present invention.
- a planar optical circuit that functions as a wavelength tunable resonator is formed on an SOI (Silicon On Insulator) substrate 113 by an optical waveguide having a core layer of Si (silicon) and a cladding layer of SiO 2 (quartz). ing.
- the planar optical circuit is a closed-loop optical circuit in which input / output optical waveguides 111 and 112, a 2 ⁇ 2 3 dB directional coupler 110, and output waveguides 101 and 109 of the 3 dB directional coupler 110 are connected to each other. And is formed from.
- air gap mirrors 102, 104 and 106 having periodic gaps are formed to form a waveguide etalon. That is, the waveguide etalon 103 having the air gap mirrors 102 and 104 as end faces and the waveguide etalon 105 having the air gap mirrors 104 and 106 as end faces are formed as stripe resonators in the closed loop optical circuit. ing.
- FIG. 4 (a), 4 (b), and 4 (c) show the configurations of the air gap mirrors 102, 106, and 104, respectively.
- Each of the 120 nm Si optical waveguides 201, 205, 208, and 211 is formed.
- the air gap mirrors 102 and 106 have the same structure, and the air gap mirror 104 has a structure having a cycle number larger than that of the air gap mirrors 102 and 106 by one period.
- FIG. 5 shows the wavelength dependence of the transmittance of the air gap mirror.
- Reference numeral 301 in the figure indicates the transmittance of the air gap mirrors 102 and 106
- reference numeral 302 indicates the transmittance of the air gap mirror 104. Both the transmittances 301 and 302 of the air gap mirror show relatively uniform characteristics with respect to the wavelength.
- heaters 107 and 108 for shifting the resonance peak of the waveguide etalon using the thermo-optic effect are formed above the waveguide etalons 103 and 105, respectively.
- one end of the semiconductor optical amplifier 100 is hybrid-integrated with the end face of the input / output waveguide 111 of the planar optical circuit coupled with low loss.
- a dielectric film is added to the other end face 115 of the semiconductor optical amplifier 100 so as to have a reflectivity of about 10%.
- an antireflection coating is applied to the end face 114 of the input / output waveguide 112 of the planar optical circuit.
- the 3 dB directional coupler 110 When current is injected into the optical amplifier 100, a part of the excitation light is bifurcated by the 3 dB directional coupler 110 via the waveguide 111 and propagates through both the waveguides 101 and 109.
- the light waves in the waveguides 101 and 109 propagate through the waveguide etalons 103 and 105 with transmittances corresponding to the wavelength components, respectively.
- the respective light waves are guided through the waveguides 101 and 109, and then are combined again by the 3 dB directional coupler 110, and enter the optical amplifier 100 through the waveguide 111.
- the wavelength light having the highest intensity among the wavelength components that have passed through the waveguide etalons 103 and 105 includes the optical amplifier 100, the waveguide 111, the 3 dB directional coupler 110, and the waveguide etalons 103 and 105.
- the laser beam travels back and forth between the composite resonators and is emitted from the end face 115 as laser light through stimulated emission in the optical amplifier 100.
- the wavelength components reflected without passing through the waveguide etalons 103 and 105 run backward in the waveguides 101 and 109 and are combined by the 3 dB directional coupler 110.
- the combined light wave propagates through the waveguide 112 and is emitted from the end face 114.
- the reason why the reflected light at the end face of the waveguide etalon propagates in the direction of the waveguide 112 after passing through the 3 dB directional coupler 110 is that the air gap mirrors 102, 106 from the 3 dB directional coupler 110 to the end face of the waveguide etalon This is because the lengths of the waveguides 101 and 109 are set equal to each other.
- FIG. 6 shows the wavelength dependence of the ratio of light intensity (transmittance) when the light wave propagated through the waveguide 111 is guided through the resonator and returns to the waveguide 111 again.
- the transmittance shows the maximum peak at the wavelength component in which the resonance wavelengths of the two waveguide etalons 103 and 105 coincide. Laser oscillation occurs at this maximum peak wavelength.
- the heater 107 or 108 is used as a resonance wavelength changing element and the waveguide etalons 103 and 105 are heated, the respective resonance wavelengths change. As a result, the wavelength component at which the resonances of the two waveguide etalons 103 and 105 coincide can be changed, so that the laser oscillation wavelength can be changed.
- the length M in the waveguide direction of the two waveguide etalons 103 and 105 is defined as L 1 and L 2 , respectively, and a parameter M called a tuning multiplication factor is defined as the following equation (1).
- ⁇ tuning is expressed by the following equation (2). Note that the wavelength interval 401 of the peak transmittance in FIG. 6 is the wavelength variable range.
- ⁇ tuning M ⁇ ⁇ FSR (2)
- L1, L2, and ⁇ FSR are set to 100 ⁇ m, 110 ⁇ m, and 3.2 nm, respectively, a configuration capable of realizing a wavelength variable width of 35 nm that can cover the entire C band in WDM optical communication is obtained.
- the wavelength variable range can be further expanded by appropriately adjusting the ratio of L 1 and L 2 in the expression (1).
- FIG. 7 is a schematic diagram showing the second embodiment. The same components as those in the first embodiment are denoted by the same reference numerals.
- a heat separation waveguide 121 is added to the configuration of the first embodiment described above. That is, in order to reduce the thermal crosstalk between the waveguide etalons 103 and 105 due to the heating of the heaters 107 and 108, a thermal separation waveguide (a waveguide for suppressing heat conduction) is provided between the waveguide etalons 103 and 105. ) 121 is inserted in two places.
- FIG. 8 is a schematic diagram showing the structure of the thermal separation waveguide 121.
- the tip of the Si waveguide core layer 601 covered with the SiO 2 cladding layer 603 has a tapered shape 602. With such a shape, the spot size of the guided light can be changed gently. Therefore, the Si waveguide core layer 601 and the optical waveguide 604 having the SiON layer as a core layer can be coupled with low loss.
- the thermal conductivity of SiON is about 1/100 that of Si. Therefore, it is possible to suppress heat conduction between the waveguides by inserting the SiON waveguide between the Si waveguides.
- the second embodiment it is possible to suppress the thermal crosstalk between the two waveguide etalons 103 and 105 without increasing the light wave loss, and the wavelength variable control is stably and highly accurate. Can be done.
- the wavelength tunable light source of the present invention includes a closed loop circuit, a composite resonator, and an optical amplifier.
- a closed loop circuit is configured by connecting two output path ends of a 2 ⁇ 2 3 dB directional coupler to each other.
- the composite resonator is configured by including at least two resonators having different resonance wavelength periods in a part of the loop of the closed loop circuit.
- One input path end of the 3 dB directional coupler is optically connected to one end of the optical amplifier.
- a reflection structure having an appropriate reflectance is added to the other end of the optical amplifier.
- the other input path end of the 3 dB directional coupler has a non-reflective structure. Laser oscillation light having a specific wavelength is output from the other end of the optical amplifier.
- At least one of the two or more resonators is provided with a resonance wavelength changing element that changes the resonance wavelength of the resonator.
- a resonance wavelength changing element that changes the resonance wavelength of the resonator.
- the 3 dB directional coupler, the closed-loop optical circuit, and the resonator are composed of optical waveguides formed on the same substrate. That is, the 3 dB directional coupler, the closed loop optical circuit, and the resonator form a planar optical circuit.
- a semiconductor amplifier is hybrid-integrated on the substrate as the optical amplifier.
- the core layer of the optical waveguide can be applied those clad layer of SiON is SiO 2.
- the core layer of the optical waveguide can be applied those clad layer with Si is SiO 2.
- a compound semiconductor substrate is used as the substrate, and the core layer of the optical waveguide is configured with a compound semiconductor composition having a refractive index larger than that of the cladding layer around the core layer. Good.
- the resonator and the semiconductor amplifier are monolithically integrated on the substrate.
- the resonator constituting a part of the closed-loop optical circuit is a waveguide resonator having a predetermined light transmittance at both ends.
- a periodic gap (a gap arranged at a predetermined interval) having a predetermined transmittance is formed in a part of the closed-loop optical circuit. Those arranged at both ends of the waveguide resonator can be applied.
- an element provided with a heater for heating in the vicinity of the resonator can be applied.
- an element having an anode and cathode electrode structure can be applied in order to use the electro-optic effect generated by applying a voltage to the core layer of the optical waveguide constituting the resonator.
- the resonance wavelength changing element has an electrode structure for applying a voltage to the dielectric film Things can be applied.
- an MMI (Multimode interference) coupler may be used.
- the first effect of the wavelength tunable light source of the above-described aspect is that another type of resonance can be achieved by expanding the FSR (free spectrum range) of a plurality of resonators constituting the wavelength tunable resonator. It is easy compared to the vessel. In addition, the wavelength variable range of the entire wavelength variable resonator can be increased.
- the FSR is limited by the bending radius of the ring.
- a resonator included in the wavelength tunable resonator it is possible to apply a striped resonator capable of expanding the FSR only by shortening its length.
- the second effect of the wavelength tunable light source of the above aspect is that a planar optical circuit can be applied to a portion constituting the wavelength tunable resonator.
- the main element of the configuration is a gap (grating mirror) for forming an etalon in the middle of the closed-loop waveguide with the 3 dB directional coupler. Therefore, since the number of components is small and the circuit configuration is simple, the manufacturing cost can be reduced.
- the third effect of the wavelength tunable light source of the above aspect is that it is possible to reduce the size of the resonator constituting the wavelength tunable resonator (to shorten the length of the striped resonator). As a result, the overall size of the wavelength tunable resonator can be reduced, and a small wavelength tunable light source can be realized.
- a fourth effect of the wavelength tunable laser of the above aspect is that the wavelength tunable resonator and the semiconductor optical amplifier can be hybrid-integrated or monolithically integrated on the same semiconductor substrate. As a result, the number of components incorporated in the module can be reduced, so that the cost can be reduced.
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Abstract
Description
非特許文献2: B.Mason et al.,「IEEE Photonics Letters」,Vol.11,No.6,June.1999,p.638-639
非特許文献3: H.Yamazaki et al.,「30th European Conference on Optical Communication」,2004,th4.2.3
特許文献1:特開2006-245344号広報
光通信における高密度波長分割多重伝送方式(D-WDM)では、通信波長帯域がC帯域とL帯域に分けられ、それぞれの波長帯域に、およそ40nm程度の波長範囲に多くの波長信号光が導入されている。
1、2 共振器
3 3dB方向性結合器
4 半導体光増幅器
11 共振器1の透過率の波長依存性を示すスペクトル
12 共振器2の透過率の波長依存性を示すスペクトル
13 共振器1と共振器2を縦列接続した場合の、合成された透過率スペクトル
100 半導体光増幅器
101、109 3dB方向性結合器の出力導波路
102、104、106 エアギャップミラー
103、105 導波路エタロン
107、108 ヒータ
110 3dB方向性結合器
111、112 入出力光導波路
114 無反射コーティングを施した導波路端面
115 半導体光増幅器の導波路出射端面
201、205、208、211 エアギャップミラーを構成するSi導波路部
202、203、204、206、207、209、210 エアギャップミラーを構成する導波路空隙部
301 エアギャップミラー101,106の透過率
302 エアギャップミラー104の透過率
401 ピーク透過率の波長間隔(即ち波長可変範囲)
121 熱分離導波路
601 Si導波路コア層
602 Siテーパ導波路コア層
603 SiO2クラッド層
604 SiON導波路
次に、本発明の第一実施例について図面を参照して詳細を説明する。
さらに、導波路エタロンの共振波長周期をレーザR、レーザの波長可変範囲をλtuningとすると、λtuningは、下記の(2)式のようになる。尚、図6におけるピーク透過率の波長間隔401が波長可変範囲である。
例えば、L1、L2、λFSRの値をそれぞれ100μm、110μm、3.2nmに設定すると、 WDM光通信におけるC帯域全域をカバーできる35nmの波長可変幅を実現できる構成が得られる。
次に本発明の第二実施例を説明する。
これまでに説明したように、本発明の波長可変光源は閉ループ型回路と複合共振器と光増幅器とを備える。
Claims (12)
- 出力されるレーザ発振光の波長を変えられる波長可変光源であって、
2つの入力路と2つの出力路を持つ3dB方向性結合器と、
前記3dB方向性結合器の2つの出力路の端どうしを互いに接続してなる閉ループ型光回路と、
前記閉ループ型光回路の一部を構成するように縦列接続された、共振波長周期の異なる少なくとも2つ以上の共振器と、
前記3dB方向性結合器の一方の入力路端に光学的に接続された一端と前記レーザ発振光が出力される他端とを有する光増幅器と、
前記光増幅器の他端に形成された所定の反射率を有する反射構造と、
前記3dB方向性結合器の他方の入力路端に形成された無反射構造と、
前記2以上の共振器のうちの少なくとも一つの共振器の共振波長を変化させる共振波長変更素子と、
を具備する波長可変光源。 - 前記3dB方向性結合器、前記閉ループ型光回路及び前記共振器が、同一基板上に形成された光導波路から構成されており、
前記光増幅器として半導体増幅器が前記基板上にハイブリット集積されていることを特徴とする請求の範囲1に記載の波長可変光源。 - 前記光導波路のコア層がSiONでクラッド層がSiO2であることを特徴とする請求の範囲2に記載の波長可変光源。
- 前記基板として、SOI(Silicon on insulator)基板が使われており、前記光導波路のコア層がSiでクラッド層がSiO2であることを特徴とする請求の範囲2に記載の波長可変光源。
- 前記基板として、化合物半導体基板が使われており、
前記光導波路のコア層が、該コア層の周辺のクラッド層よりも屈折率が大きくなるような化合物半導体組成で構成されていることを特徴とする請求の範囲2に記載の波長可変光源。 - 前記共振器と前記半導体増幅器とが前記基板上にモノリシック集積されていることを特徴とする請求の範囲5に記載の波長可変光源。
- 前記閉ループ型光回路の一部を構成する前記共振器が、両端に所定の反射率を有する導波路型共振器であることを特徴とする請求の範囲1から6のいずれかに記載の波長可変光源。
- 前記閉ループ型光回路の一部に、所定の反射率を有する周期的な空隙が形成されており、該周期的な空隙は、前記導波路型共振器の両端それぞれに配されていることを特徴とする請求の範囲7に記載の波長可変光源。
- 前記共振波長変更素子として、前記共振器の近傍に加温のためのヒータを備えたこと特徴とする請求の範囲1から8のいずれかに記載の波長可変光源。
- 前記共振波長変更素子として、前記共振器を構成する光導波路のコア層に電圧を印加することにより生じる電気光学効果を利用するために陽極及び陰極の電極構造を備えたことを特徴とする請求の範囲4から6のいずれかに記載の波長可変光源。
- 前記共振器を構成する光導波路のクラッドの少なくとも一部が電気光学効果を有する誘電体膜であり、前記共振波長変更素子として、該誘電体膜に電圧を印加するための電極構造を有したことを特徴とする請求の範囲4から6のいずれかに記載の波長可変光源。
- 前記3dB方向性結合器の代替として、MMI(Multimode interference)カプラを用いたことを特徴とする請求の範囲1から11のいずれかに記載の波長可変光源。
Priority Applications (2)
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US12/864,057 US8379300B2 (en) | 2008-02-19 | 2009-02-03 | Wavelength-variable light source with dual resonator loop circuit |
JP2009554267A JP5375620B2 (ja) | 2008-02-19 | 2009-02-03 | 波長可変光源 |
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JP2008-037285 | 2008-02-19 | ||
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PCT/JP2009/051733 WO2009104469A1 (ja) | 2008-02-19 | 2009-02-03 | 波長可変光源 |
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US (1) | US8379300B2 (ja) |
JP (1) | JP5375620B2 (ja) |
WO (1) | WO2009104469A1 (ja) |
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US9312662B1 (en) | 2014-09-30 | 2016-04-12 | Lumentum Operations Llc | Tunable laser source |
GB201418637D0 (en) | 2014-10-20 | 2014-12-03 | Univ St Andrews | Laser |
CN106932862B (zh) * | 2017-04-20 | 2019-05-28 | 上海交通大学 | 基于硅基纳米梁环路结构的粗波分复用器 |
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JPS6255983A (ja) * | 1985-09-05 | 1987-03-11 | Nec Corp | 光フアイバを用いた外部光帰還半導体レ−ザ |
JPH10209534A (ja) * | 1997-01-23 | 1998-08-07 | Furukawa Electric Co Ltd:The | 光ファイバレーザ |
JP2000077771A (ja) * | 1998-06-16 | 2000-03-14 | Fujitsu Ltd | 半導体光増幅装置 |
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SU1755246A1 (ru) * | 1988-12-13 | 1992-08-15 | Всесоюзный научно-исследовательский институт электроизмерительных приборов | Оптический транзистор |
US5353295A (en) * | 1992-08-10 | 1994-10-04 | The Board Of Trustees Of The University Of Illinois | Semiconductor laser device with coupled cavities |
US6009115A (en) * | 1995-05-25 | 1999-12-28 | Northwestern University | Semiconductor micro-resonator device |
US5684623A (en) * | 1996-03-20 | 1997-11-04 | Hewlett Packard Company | Narrow-band tunable optical source |
US6570893B1 (en) * | 1998-11-25 | 2003-05-27 | Science & Technology Corporation @ Unm | Precisely wavelength-tunable and wavelength-switchable narrow linewidth lasers |
US6389044B1 (en) * | 1999-07-02 | 2002-05-14 | Corning Incorporated | Multi-wavelength laser usable for WDM applications and interferometric sensors |
IL132385A0 (en) * | 1999-10-14 | 2001-03-19 | Lambda Crossing Ltd | An integrated optical device for data communications |
KR100416999B1 (ko) * | 2001-10-12 | 2004-02-05 | 삼성전자주식회사 | 평면 도파로 소자형 광증폭기 |
US6940878B2 (en) * | 2002-05-14 | 2005-09-06 | Lambda Crossing Ltd. | Tunable laser using microring resonator |
JP4945907B2 (ja) | 2005-03-03 | 2012-06-06 | 日本電気株式会社 | 波長可変レーザ |
US7489439B2 (en) * | 2006-09-12 | 2009-02-10 | Intel Corporation | Semiconductor Raman ring amplifier |
US7830941B2 (en) * | 2007-01-30 | 2010-11-09 | Vega Wave Systems, Inc. | Wavelength selective and tunable semiconductor laser device with coupled cavities |
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2009
- 2009-02-03 US US12/864,057 patent/US8379300B2/en not_active Expired - Fee Related
- 2009-02-03 WO PCT/JP2009/051733 patent/WO2009104469A1/ja active Application Filing
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Publication number | Priority date | Publication date | Assignee | Title |
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JPS6255983A (ja) * | 1985-09-05 | 1987-03-11 | Nec Corp | 光フアイバを用いた外部光帰還半導体レ−ザ |
JPH10209534A (ja) * | 1997-01-23 | 1998-08-07 | Furukawa Electric Co Ltd:The | 光ファイバレーザ |
JP2000077771A (ja) * | 1998-06-16 | 2000-03-14 | Fujitsu Ltd | 半導体光増幅装置 |
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US20100296159A1 (en) | 2010-11-25 |
JPWO2009104469A1 (ja) | 2011-06-23 |
US8379300B2 (en) | 2013-02-19 |
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