WO2004010194A1 - 光学装置およびその組立方法 - Google Patents
光学装置およびその組立方法 Download PDFInfo
- Publication number
- WO2004010194A1 WO2004010194A1 PCT/JP2003/009070 JP0309070W WO2004010194A1 WO 2004010194 A1 WO2004010194 A1 WO 2004010194A1 JP 0309070 W JP0309070 W JP 0309070W WO 2004010194 A1 WO2004010194 A1 WO 2004010194A1
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- substrate
- optical
- optical element
- light
- temperature
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/62—Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
Definitions
- the present invention relates to an optical device having an optical element fixed at a predetermined position on a substrate (base) and a method for assembling the optical device.
- FIG. 1 a fixed holder 101 is fixed on a metal substrate 100 with screws 102, and a lens holder 1 1 1 holding a lens 110 is fixed to the fixed holder 101.
- the pillars 1 1 and 2 are fitted and attached, and the fitted state is fixed with screws (not shown).
- the position of the fixed holder 101 can be adjusted in the horizontal direction by loosening the fastening with the screw 102, and the position of the lens holder 111 can be adjusted in the vertical direction by adjusting the fitting position of the column 111. is there.
- a fixed holder 1 25 is bonded and fixed on a metal substrate 100 with solder 126, and a lens 120 A configuration in which a metal holder for holding the lens 120) is joined and fixed with solder 121 has also been used.
- an optical element disposed on the substrate in this manner for example, there is a wavelength conversion crystal.
- temperature management management for heating to a desired temperature
- Etc. are required for some elements. Therefore, an optical element whose temperature is controlled to be high and an optical element which is kept at room temperature is disposed on the substrate, and a temperature difference is generated in the substrate, and the difference in the amount of expansion of the substrate due to the temperature difference is generated. Therefore, there is a problem that the arrangement position of the optical element is shifted. Disclosure of the invention
- the present invention has been made in view of such a problem, and when an optical element is arranged close to a substrate to constitute an optical device, when the temperature of each optical element differs depending on whether or not temperature management is performed, this temperature difference is obtained. It is an object of the present invention to provide an optical device having a configuration capable of suppressing an influence of the optical element on a substrate and suppressing a dislocation position of an optical element on the substrate, and an assembling method thereof.
- Another object of the present invention is to provide an optical device having a configuration in which a plurality of optical elements can be easily arranged and fixed in close proximity on a substrate, and can be made compact, and an assembling method thereof.
- an optical device includes: a substrate (base); an optical system including a plurality of optical elements bonded and fixed on the substrate with an adhesive material; consists of a temperature control device for managing the temperature of the desired optical element, the substrate is thermal expansion coefficient of 1 0 - 6 ⁇ 1 0 - 9 mZK der Made from the material.
- the thermal expansion coefficient of 1 0-6 -1 0 substrate - by making from 9 m / K at which the material, the substrate under the influence of temperature control of this even if the temperature control of the desired optical element There is almost no expansion or contraction, and the position of the optical element on the substrate can be accurately maintained.
- the plurality of optical elements include an optical element whose temperature is controlled by a temperature control device and an optical element whose temperature is not controlled, and the optical element whose temperature is controlled and the optical element whose temperature is not controlled are mixed on the substrate.
- an optical device can be configured.
- an optical device in which at least one of the plurality of optical elements is temperature-controlled by a temperature control device to generate a temperature gradient in the surface of the substrate can be used without any problem.
- the temperature control device has a heat source for heating a desired optical element to a predetermined high temperature.
- the thermal expansion coefficient of 1 0 - as the material is s ⁇ l 0- 9 mZK, preferable to use a glass material. ⁇
- An optical device can be configured by disposing optical elements on both the front and back surfaces of the substrate.
- the substrate is made of a light transmissive material
- a first optical path deflecting element is provided on at least one of the front and back surfaces of the substrate, and the light passing through the optical element provided on the one surface is made first.
- the optical element may be configured to be deflected by the optical path deflecting element, pass through the substrate, and enter the optical element provided on the other surface of the substrate.
- the first optical path deflecting element deflects light so as to be perpendicularly incident on one surface of the substrate and pass through the substrate
- the second optical path deflecting element disposed on the other surface of the substrate causes the substrate to be deflected by the second optical path deflecting element. May be configured to deflect light passing through the optical element and make the light incident on the optical element provided on the other surface.
- the first optical path deflecting element makes light obliquely incident on one surface of the substrate. Then, the light is deflected so as to pass through the substrate, and the light is split into a plurality of lights corresponding to the wavelengths by the prism function of the substrate and emitted to the opposite surface of the substrate.
- the second optical path deflecting element provided on the other surface may be configured to be deflected by the second optical path deflecting element and enter the optical element provided on the other surface.
- the material constituting the substrate may have desired filter characteristics with respect to light passing through the substrate.
- the substrate is composed of quartz glass.
- the holder is preferably made of quartz glass.
- the adhesive material is composed of an ultraviolet-curable adhesive.
- a cover member made of quartz glass is mounted on the substrate to which the optical element is adhered and fixed so as to surround the optical element, and the optical element can be disposed in a closed space surrounded by the substrate and the cover member.
- the thermal expansion coefficient of 1 0 - 6 to a predetermined position on the substrate material made of a 1 0- 9 m / K is temperature controlled by the temperature management system
- An optical system is formed by positioning a plurality of optical elements including the optical element and bonding and fixing them with an adhesive material.
- the thermal expansion coefficient is preferable to use a glass material as the material is 1 0- e ⁇ l 0- 9 mZ K.
- the optical element is supported by the position adjusting jig, the optical element is positioned at a predetermined position on the substrate, and the optical element is bonded and fixed on the substrate with an adhesive material in such a state.
- the holder may be fixed on the substrate with an adhesive material, and the optical element may be fixed on the holder.
- An ultraviolet curable adhesive can be used as the adhesive material.
- the substrate may be made of quartz glass, and the ultraviolet curable adhesive may be cured by irradiating ultraviolet light through the substrate.
- a cover member made of quartz glass may be mounted on the substrate to which the optical element is adhered and fixed so as to surround the optical element, and the optical element may be disposed in a closed space surrounded by the substrate and the cover member.
- the ultraviolet-curable adhesive can be hardened by irradiating ultraviolet light through the cover member.
- FIG. 1 is a schematic diagram illustrating a configuration of a wavelength conversion device according to a first embodiment of the present invention.
- FIG. 2 is a side view for explaining a method of mounting an optical element (lens) on a substrate in the wavelength converter.
- FIG. 3 is a side view for explaining a second method for mounting an optical element (lens) on a substrate in the wavelength conversion device.
- FIG. 4 is a side view for explaining a third method of mounting an optical element (lens) on a substrate in the wavelength converter.
- FIG. 5 is a side view for explaining a fourth method for mounting an optical element (wavelength conversion crystal) on a substrate in the wavelength conversion device.
- FIG. 6 is a side view for explaining a fifth method for mounting an optical element (wavelength conversion crystal) on a substrate in the wavelength conversion device.
- FIG. 7 is a schematic diagram illustrating a configuration of a wavelength conversion device according to a second embodiment of the present invention.
- FIG. 8 is a schematic diagram illustrating a configuration of a wavelength conversion device according to a third embodiment of the present invention. It is.
- FIG. 9 is a schematic diagram illustrating a configuration of a wavelength conversion device according to a fourth embodiment of the present invention.
- FIG. 10 is a schematic diagram illustrating a configuration of a wavelength conversion device according to a fifth embodiment of the present invention.
- FIG. 11 is a perspective view showing a configuration of a wavelength conversion device according to a sixth embodiment of the present invention in a state where a substrate is disassembled into constituent parts.
- FIG. 12 is a perspective view showing a configuration of the wavelength conversion device according to the sixth embodiment in a state where a substrate is assembled.
- FIG. 13 is a schematic side view showing a part of the configuration of a wavelength conversion device according to a seventh embodiment of the present invention.
- FIG. 14 is a schematic side view showing a part of a configuration of a wavelength conversion device according to a seventh embodiment of the present invention.
- FIG. 15 is a front view showing an example of mounting a conventional optical element.
- FIG. 16 is a side view showing another example of mounting a conventional optical element. BEST MODE FOR CARRYING OUT THE INVENTION
- the present invention has a great feature in a configuration in which an optical element is fixedly held on a substrate.
- the overall configuration of an optical device including a plurality of optical elements fixed and held in this manner is described by taking a wavelength converter as an example. explain. First embodiment
- FIG. 1 shows a first embodiment of the wavelength conversion device.
- This device converts the wavelength of the incident light Li of the fundamental wave (wavelength I550 nm) from the light source 1, Create the output light Lo of the harmonic wave (wavelength around 190 nm).
- Light source 1 is It consists of a DFB laser that emits light of the main wave and a fiber amplifier that amplifies this light, and the light L i of the fundamental wave amplified by the fiber amplifier enters the wavelength converter.
- a laser and a fiber amplifier are disclosed in Japanese Patent Application Laid-Open No. 2000-200747 filed by the present applicant.
- the wavelength conversion device is configured by arranging a number of optical elements on a substrate 5 as shown in FIG. 1, and the arrangement and role of each optical element will be described below along the movement path of incident light. Will be described.
- the substrate 5 is made of a material having a lower coefficient of thermal expansion than a normal metal (a material having a coefficient of thermal expansion of 10 ⁇ 6 to 10 ⁇ 9 ⁇ ⁇ ), such as a glass material, a ceramic, and a special metal (the main components Ni, Fe , C o), etc., to suppress the thermal expansion of the substrate with respect to a change in ambient temperature, and to minimize the change in position of each optical element arranged on the substrate 5. Further, as described later, it is preferable that the substrate 5 is made of quartz glass so that ultraviolet light or laser light can be passed through the substrate 5 and irradiated.
- the incident light L i of the fundamental wave incident from the light source 1 into the wavelength converter first enters the dichroic mirror 11 and reflects the pump light used for amplification by the fiber amplifier. Only the fundamental signal light is passed.
- the signal light that has passed through the dichroic mirror 11 passes through the wave plates 12 and 13 to have a desired polarization state, and enters the first wavelength conversion crystal 31 via the lens 14 and the mirror 15.
- the first wavelength conversion crystal 31 is composed of an LBO crystal, and a part of the signal light of the fundamental wave incident thereon is converted into a second harmonic. For this reason, the unconverted fundamental signal light and the second harmonic signal light are emitted from the first wavelength conversion crystal 31 and passed through the wave plate 16 and the lens 17 to be converted into the second wavelength. It is incident on crystal 32.
- the wave plate 16 is for adjusting the polarization state of the fundamental wave to the polarization state of the second harmonic.
- the second wavelength conversion crystal 32 is composed of an LBO crystal, The wavelength and a part of the second-harmonic signal light are wavelength-converted into third-harmonic waves, and the fundamental, second-harmonic, and third-harmonic signal lights are emitted from the second wavelength conversion crystal 32. As described above, of the signal light emitted from the second wavelength conversion crystal 32, the second and third harmonic signal lights are reflected by the dichroic mirror 18, and the fundamental wave signal light is reflected by the dichroic mirror 1 The light passes through 8 and is reflected by the reflecting mirror 23.
- the third wavelength conversion crystal 33 is composed of a GdYCOB crystal, and a part of the second-harmonic signal light incident thereon is wavelength-converted into a fourth-harmonic signal light. Then, the signal lights of the fourth and third harmonics are emitted from the third wavelength conversion crystal 33, and the light thus emitted is incident on the fourth wavelength conversion crystal 34 via the lens 20.
- the fourth wavelength conversion crystal 33 is composed of a BBO crystal, and a part of the third- and fourth-harmonic signal light incident thereon is wavelength-converted into the seventh-harmonic wave.
- the seventh harmonic signal light emitted from the fourth wavelength conversion crystal 34 is reflected by the dichroic mirror 27 via the lenses 21 and 22.
- the signal light of the fundamental wave transmitted through the dichroic mirror 18 and reflected by the reflecting mirror 23 is reflected by the reflecting mirror 26 via the lenses 24 and 25, and passes through the dichroic mirror 27.
- the signal light of the seventh harmonic reflected by the dichroic mirror 27 and the signal light of the fundamental wave transmitted through the dichroic mirror 27 are coaxially overlapped as described above, and the fifth wavelength conversion crystal 35 Incident on.
- the fifth wavelength conversion crystal 35 is composed of a CLBO crystal, and the fundamental wave and a part of the seventh harmonic signal light are wavelength-converted to the eighth harmonic signal light.
- the fifth wavelength conversion crystal 35 emits the signal light of the fundamental wave, the signal light of the seventh harmonic, and the signal light of the eighth harmonic that have not been wavelength-converted, and this is reflected by the reflecting mirror 28. The light is reflected and emitted out of the device as the emission signal light Lo.
- the reflecting mirror 28 is configured to output the light L 0. It is for setting the emission direction and does not contribute to wavelength conversion. Also, when beam shaping or the like is required in the device, it is necessary to additionally provide lenses and the like accordingly. Further, the types of the crystals constituting the first to fifth wavelength conversion crystals 31 to 35 are only examples, and the first to third wavelength conversion crystals 31 1, 3 2, 3 As 3, there are PP LN, PPL II, PPK PT, etc., and as the fifth wavelength conversion crystal 35, LBO, BBO, etc. can be considered. However, it is necessary to change the wave plate and lens according to the type of crystal used.
- the temperature is set to a desired value to achieve non-critical phase matching.
- the fifth wavelength conversion crystal 35 composed of a CLBO crystal is preferably kept at a temperature of about 150 degrees Celsius to keep it dry.
- the fourth wavelength conversion crystal 34 made of BBO crystal is critically phase-matched, so there is basically no need to adjust the temperature. However, if there is an effect of the temperature around the crystal, If the internal temperature distribution is not uniform), the temperature of the entire BBO crystal is stabilized by adjusting the temperature of the BBO crystal, and the power fluctuation of the wavelength-converted light can be suppressed.
- a temperature management device or a heating device is provided corresponding to an optical element (wavelength conversion crystal) requiring temperature management (management for heating to a desired temperature) as described above.
- the remaining optical elements remain at room temperature, and the surface temperature distribution of the substrate 5 becomes non-uniform, resulting in a temperature gradient.
- the substrate 5 is made of a glass material having a small coefficient of thermal expansion as described above, the amount of thermal expansion of the substrate 5 is extremely small even if there is a temperature gradient, and the substrate 5 is disposed on the substrate 5. The position change of each optical element is very small.
- the wavelength conversion device is assembled by positioning and arranging optical elements such as lenses, mirrors, wavelength plates, wavelength conversion crystals, and the like at predetermined positions on the substrate 5 made of quartz glass.
- optical elements such as lenses, mirrors, wavelength plates, wavelength conversion crystals, and the like
- the method for positioning and mounting each optical element will be described below. In the following, a method of positioning and mounting the lens Ls on the substrate 5 as a representative of the optical element will be described.
- FIG. 2 shows the first mounting method, in which a holder 51 for roughly adjusting the height to the substrate 5 is bonded with an adhesive 52, and the lens Ls is placed on the holder 51 with an ultraviolet ray. They are joined and fixed with a curable adhesive 53 (hereinafter referred to as UV adhesive).
- UV adhesive a curable adhesive 53
- the holder 51 only roughly adjusts the height, and accurate position adjustment (fine adjustment) is required when bonding the lens Ls on the holder 51.
- an adjustment jig 55 is arranged outside the substrate 5, and the lens L s is gripped by the holding tool 57 attached to the tip of the arm 56 of the adjustment jig 55, and the lens L s is held. Position adjustment is performed.
- the adjustment jig 66 is placed on an XYZ stage (not shown), and the position of the lens Ls is adjusted by adjusting the movement of the gripper 57 in the XYZ directions.
- the UV adhesive 53 is irradiated with ultraviolet light to cure it, and the lens Ls is accurately positioned and mounted in a predetermined position.
- the adjusting jig 55 is mounted. Remove and complete the installation of lens L s.
- the UV adhesive 53 can be irradiated with ultraviolet light through the quartz glass substrate 5, which is very convenient.
- the holder 51 may be bonded to the substrate 5 with a UV adhesive.
- Fig. 3 shows the second mounting method.
- a UV adhesive 54 It is also possible to position and join the lens Ls. At this time, the position of the lens Ls is adjusted using a position adjusting jig 55 as shown in FIG.
- FIG. 4 shows a third mounting method.
- the first holder 61 is adhered to the substrate 5 with the UV adhesive 64, and a hollow cylindrical shape is mounted on the first holder 61.
- the second holder 62 is bonded with a UV adhesive 65.
- a cylindrical third holder 63 is attached to the lens LS with a UV adhesive 66, and this third holder 63 is fitted into the hollow cylindrical space of the second holder 62, and the UV adhesive 6 Attach it in 2a.
- height adjustment based on the thickness of the UV adhesive is eliminated, and the problem of the thickness change due to the temperature change of the UV adhesive 64, 65, 66 is almost eliminated.
- the method of fixing the lens and the holder using UV adhesive is used, but once the UV adhesive is cured, it can not be removed and the position cannot be readjusted. It is. Therefore, in the following fourth and fifth attachment methods, solder is used instead of the UV adhesive.
- FIG. 5 shows a fourth mounting method, in which an example of mounting the wavelength conversion crystal 70 held by the holder 71 to the substrate 5 is shown.
- the legs 7 2 of the holder 7 1 are joined to the surface of the board 5 by the solder 7 3 .
- the holder 7 1 is removed from the board 5 by heating the solder 7 3, and the position is adjusted again. It can be performed.
- a heater may be attached to the holder 71, or a laser beam may be irradiated from outside to heat the solder joint.
- FIG. 6 shows a fifth mounting method, in which a concave portion 5 a is formed in the substrate 5, and the leg portion 72 of the holder 71 is fixed and held by the solder 75 in the concave portion 5 a.
- the holder 71 holds the wavelength conversion crystal 70 This is the same configuration as in FIG. In this case, the adjustment range in the height direction of the legs 72 can be made wider than in the case of FIG. Second embodiment
- FIG. 7 shows a wavelength converter according to the second embodiment.
- the same optical element as that of the device shown in FIG. 1 is arranged on a substrate 5 made of a glass material (quartz glass).
- an enclosure 6 made of quartz glass is attached around the upper surface of the substrate 5.
- the optical elements disposed on the substrate 5 are exactly the same as those of the device according to the first embodiment in FIG. 1, and therefore, the same parts are denoted by the same reference numerals and description thereof will be omitted.
- Quartz glass is transparent to all wavelengths up to the above-mentioned fundamental wave (1550 nm) and the 8th harmonic (1900 ⁇ m), so that incident light Li and output light It is not necessary to provide an opening in a portion through which Lo passes, and all the optical elements provided on the substrate 5 can be hermetically provided in the internal space covered by the enclosure 6. For this reason, the ambient temperature and humidity of the optical element can be appropriately controlled, and for example, a wavelength conversion crystal that is sensitive to humidity can be held in a dry atmosphere to prevent a decrease in its performance. In this case, when silica gel is used as a dehumidifying agent inside, since the substrate 5 and the enclosure 6 are transparent, the life of the gel can be easily visually judged from the outside.
- each optical element is blocked from the outside air to prevent the entry of organic substances, It is also possible to purge the internal space with nitrogen.
- a temperature management device or a heating device may be provided corresponding to an optical element (wavelength conversion crystal) requiring temperature management (management for heating to a desired temperature) to perform temperature management or heating management.
- an optical element wavelength conversion crystal
- temperature management management for heating to a desired temperature
- the substrate 5 is made of a glass material having a small coefficient of thermal expansion, Even if there is a temperature gradient, the amount of thermal expansion of the substrate 5 is extremely small, and the position change of each optical element arranged on the substrate 5 is very small.
- FIG. 8 shows a third embodiment.
- the same optical element as that of the apparatus shown in FIG. 1 is provided on a substrate 5 made of a glass material (quartz glass), and the upper surface of the substrate 5 is covered as shown in FIG. Box 7 is installed.
- the optical elements provided on the substrate 5 are exactly the same as those of the device according to the first embodiment shown in FIG. 1, and therefore, the same parts are denoted by the same reference numerals and description thereof will be omitted.
- the above-described chemical cleaning phenomenon occurs in an optical element that receives signal light that is ultraviolet light having a short wavelength.
- the dichroic mirror 11 and the wave plates 12 and 13 which receive the incident light L i from the light source 1 which is light in the near-infrared region and the chemical cleaning phenomenon hardly causes a problem are enclosed. It is arranged outside of 7, and the remaining optical elements are covered with an enclosure 7. Then, the incident light Li passing through the dichroic mirror 11 and the wave plates 12 and 13 passes through the inclined portion 7a of the enclosure 7 and enters the interior space of the enclosure 7. a is set so that the inclination angle with respect to the optical axis becomes the Brewster angle with respect to the fundamental wave, and the signal light of the fundamental wave can be incident into the internal space with high transmittance. Also, this W
- the polarization state of the fundamental wave can be known.
- the output signal light Lo which is wavelength-converted by the wavelength conversion device and reflected and emitted by the reflecting mirror 28, is transmitted through the prism portion 7b formed in the enclosure 7 and emitted to the outside. ing. Due to the prism action of the prism part 7b, the output signal light Lo is emitted at different refraction angles corresponding to the wavelengths, and is eight times higher than the output signal light Lo mixed with the fundamental wave, the seventh harmonic and the eighth harmonic. Waves can be separated. At this time, if the inclination angle of the prism portion 7b is set so as to be a Brewster angle with respect to the eighth harmonic, it is possible to emit the eighth harmonic with a high transmittance.
- a wavelength-converting crystal that is sensitive to humidity can be kept in a dry atmosphere to prevent its performance from deteriorating.For this reason, when silica gel is used inside, the substrate 5 and the enclosure 7 are transparent, so the life of silica gel is Can be easily determined visually.
- the internal space may be purged with nitrogen to suppress the occurrence of the chemical cleaning phenomenon.
- FIG. 9 shows a fourth embodiment.
- the same optical element as that of the apparatus shown in FIG. 1 is provided on a substrate 5 made of a glass material (quartz glass), and the upper surface of the substrate 5 is covered as shown in FIG.
- the enclosure 8 has an outer peripheral portion 8a that covers the outer peripheral side surface and a partition wall 8b that divides the internal space into two, and the closed space surrounded by the substrate 5 and the enclosure 8 is partitioned by the partition wall 8b.
- first and second sealed rooms R 1 and R 2 are formed.
- the optical elements disposed on the substrate 5 are exactly the same as those of the device according to the first embodiment in FIG. 1, and therefore, the same parts are denoted by the same reference numerals and description thereof will be omitted.
- an optical element through which signal light of the 7th and 8th harmonics, which is light in the ultraviolet region, passes is disposed in the second room R2, and nitrogen is passed through the second room R2. Purging is used to suppress the occurrence of the above-mentioned chemical cleaning phenomenon.
- the ambient environment temperature and humidity of the optical elements provided therein can be appropriately managed.
- a wavelength-converting crystal that is sensitive to humidity can be held in a dry atmosphere to prevent its performance from deteriorating.
- silica gel when silica gel is used inside, the substrate 5 and the enclosure 8 are transparent, The life of the force gel can be easily visually determined from the outside.
- FIG. 10 shows a fifth embodiment. Also in this apparatus, the same optical element as the apparatus in FIG. 1 is disposed on a substrate 5 made of a glass material (quartz glass).
- the optical elements provided on the substrate 5 are the same except for the first and second wavelength conversion crystals, the same parts are denoted by the same reference numerals and description thereof will be omitted.
- the first and second wavelength conversion crystals 31 ′ and 32 ′ are configured using QPM elements such as PPLN, PPPTP, and PPLT instead of LBO crystals. Since this QPM device can perform non-critical phase matching at any temperature, the first to fifth wavelength conversion crystals 31, 32 ′, 33, 33, 34, and 35 are arranged on the substrate 5. Can be adjusted to the same temperature, and the number of wires and power consumption for temperature control can be reduced.
- QPM elements such as PPLN, PPPTP, and PPLT instead of LBO crystals. Since this QPM device can perform non-critical phase matching at any temperature, the first to fifth wavelength conversion crystals 31, 32 ′, 33, 33, 34, and 35 are arranged on the substrate 5. Can be adjusted to the same temperature, and the number of wires and power consumption for temperature control can be reduced.
- heat from a heat source 80 with a temperature controller is transferred to all crystals by a heat pipe 81 to control the temperature of these crystals.
- this temperature management can be performed by installing a temperature sensor for a wavelength conversion crystal requiring a temperature setting and adjusting the temperature.
- a temperature sensor may be installed at an arbitrary position to perform temperature control according to the crystal to be used, such as avoiding deliquescence and preventing light damage.
- the surface temperature distribution of the substrate 5 becomes non-uniform because a temperature of other optical elements is at room temperature, and a temperature gradient occurs.
- the substrate 5 is made of a glass material having a small coefficient of thermal expansion, the amount of thermal expansion of the substrate 5 is extremely small even with such a temperature gradient, and The change in the position of each of the optical elements arranged in the area is very small.
- a substrate 5 'made of a glass material is composed of a heat source plate 85 with a temperature controller, and upper and lower substrate plates 86, 87 sandwiching the heat source plate 85 from above and below. .
- first to fifth wavelength conversion crystals 31 to 35 requiring temperature control are arranged on the heat source plate 85.
- Openings 86a to 86e are formed in the upper substrate plate 86 so that the first to fifth wavelength conversion crystals 31 to 35 are inserted therethrough, and the upper substrate plate 86 is a heat source plate 85
- the first to fifth wavelength conversion crystals 31 to 35 protrude from the upper surface as shown in FIG.
- another optical element is disposed on the upper substrate plate 86, for example, as shown in FIG.
- the heat source plate 85 is maintained at the temperature set by the temperature controller, and all of the first to fifth wavelength conversion crystals 31 to 35 installed thereon have the temperature set in this manner.
- the heat source plate 85 with a controller is provided with a heat source such as a heater and a temperature sensor such as a platinum resistance Z thermistor, and is made of a material having a high thermal conductivity such as aluminum, copper, and (certain) ceramics. If glass is used for the upper substrate plate 86 on which the optical element is installed, it can be bonded and fixed by UV hardening resin. Further, since glass has a low thermal conductivity, heat from the heat source plate 85 can be prevented from being transmitted to the optical components installed on the upper substrate plate 86. When there is no problem even if all the optical elements used have the same high temperature, the upper substrate plate 86 may be omitted and all the optical elements may be installed on the heat source plate 85.
- the surface temperature distribution of the substrate 5 becomes non-uniform because the other optical elements are at room temperature, and a temperature gradient occurs.
- the substrate 5 is made of a glass material having a small coefficient of thermal expansion as described above, even if there is such a temperature gradient, the heat of the substrate 5 can be reduced. The amount of expansion is extremely small, and the position change of each optical element arranged on the substrate 5 is very small.
- FIG. 13 shows a seventh embodiment.
- the wavelength converter has been specifically illustrated and described. Here, a part of the wavelength converter is extracted and shown.
- This optical device has a flat substrate 150 made of a light-transmitting glass material (for example, quartz glass), and has an upper surface (surface) 150a and a lower surface (back surface) 150a.
- 50b is provided with a plurality of optical elements as shown.
- the first lens 151, the wavelength conversion element 152, and the second lens 153 are disposed on the upper surface 150a along the optical axis of the incident light L i parallel to the upper surface 150a.
- a first reflecting mirror 154 are provided, and a second reflecting mirror 155 and a third lens 156 facing vertically above and below the substrate 150 are provided on the lower surface 150b. ing.
- the first to third lenses 15 1, 15 3, 15 6 are mounted on the substrate 15 0 via holders 15 1 a, 15 3 a, 15 56 a, respectively.
- the length conversion element 152 is mounted on the substrate 150 via the holder 152a. The attachment of the lens and the wavelength conversion element via these holders is performed by using the above-described optical element assembling method.
- the incident light L i of the first wavelength parallel to the upper surface 150 a of the substrate 150 enters the wavelength conversion element 15 2 through the first lens 15 1, Part of the light is wavelength-converted into light of the second wavelength. For this reason, light of the first and second wavelengths is emitted from the wavelength conversion element 15 2, and after passing through the second lens 15 3, hits the reflecting surface 15 5 a of the first reflecting mirror 15 4 Is reflected.
- the reflecting surface 154a is inclined 45 degrees with respect to the upper surface 150a of the substrate 150, and the light reflected by the reflecting surface 154a is perpendicularly incident on the substrate 150. I do.
- the substrate 150 Since the substrate 150 has a light transmitting property, this light passes through the substrate 150 and is reflected by the reflecting surface 150a of the second reflecting mirror 150.
- the reflecting surface 150a is inclined by 45 degrees with respect to the lower surface 150b of the substrate, and the light reflected on the reflecting surface 150a extends parallel to the lower surface 150b and the third lens 1b.
- the light passes through 5 6 and becomes the output signal light Lo.
- it is the light having the first and second wavelengths that causes the light reflected by the reflecting surface 154a to be perpendicularly incident on the substrate 150. This is because the light of the two wavelengths is not split. When light of two wavelengths may be separated, the light may be obliquely incident on the substrate 150.
- the optical elements are arranged on the upper and lower surfaces of the substrate 150, and the light is reflected by using the reflecting mirrors 154 and 155 facing each other, so that the substrate 150 Since optical signals are transmitted and received between the upper and lower surfaces of the substrate, optical elements disposed on the upper and lower surfaces of the substrate can be organically connected to form an optical device. Therefore, the optical device can be configured to be small and compact by effectively utilizing the upper and lower surfaces of the substrate.
- FIG. 13 shows an example in which light is transmitted only once through the substrate 150 by a pair of reflecting mirrors 154 and 155 facing up and down. A configuration may be adopted in which a pair of reflecting mirrors is provided and the light is reflected a plurality of times.
- FIG. 1 An eighth embodiment is shown in FIG.
- This optical device is made of a light transmissive glass material (eg, quartz glass).
- a flat substrate 160 is provided, and a plurality of optical elements are provided on the upper surface 160a and the lower surface 160b as shown in the figure.
- the first lens 161, the wavelength conversion element 162, and the first reflecting mirror 16 are arranged on the upper surface 16a along the optical axis of the incident light L i parallel to the upper surface 16a. 3 is provided, and on the lower surface 160 b, second and third reflecting mirrors 165 and 166 which are obliquely opposed to each other across the substrate 160 are provided.
- the first lens 161 and the wavelength conversion element 162 are mounted on the substrate 160 via the holders 16a and 162a. Is performed by using the assembling method described above.
- the incident light Li of the first wavelength enters the wavelength conversion element 162 through the first lens 161, and a part of the light is converted into light of the second wavelength. Is done. For this reason, light of the first and second wavelengths is emitted from the wavelength conversion element 162, and impinges on the reflecting surface 1663a of the first reflecting mirror 163 and is reflected obliquely downward.
- the reflecting surface 163a is inclined as shown in the figure with respect to the upper surface 160a of the substrate 160, and the light reflected by the reflecting surface 163a is obliquely incident on the substrate 160.
- the light obliquely incident as described above is separated into a first wavelength light and a second light wavelength by the prism function of the substrate 160 and is emitted from the lower surface 160 b of the substrate 160. .
- the second and third reflecting mirrors 165, 166 and the reflecting surfaces 165a, 166a are separated by the prism function as described above. And light at the second wavelength. For this reason, the light of the first and second wavelengths is reflected by the reflecting surfaces 1665a and 1666a, respectively, and becomes the first and second output signal lights Lo (1) and Lo (2). Is emitted.
- the light after wavelength conversion can be divided according to the wavelength by obliquely incident light on the substrate 160, and each of the light is converted into a desired optical element. It is possible to separate and enter.
- Substrate 1 If the separation of the light of the first and second wavelengths is small by merely transmitting the light once, the separation distance can be increased by repeatedly transmitting the light through the substrate 160 a plurality of times.
- optical elements are provided on both the upper and lower surfaces of the substrate 160, and the optical elements are arranged on the upper and lower surfaces by using the reflecting mirrors 16 3, 16 5 and 16 6. Since the optical signal is exchanged between the lower surfaces, the upper and lower surfaces of the substrate can be effectively used, and the optical device can be made compact and compact.
- the material of the substrate 160 it is possible to provide a function as a wavelength filter according to the light transmission characteristics of this material.
- another optical path deflecting element for example, a prism may be used instead of the reflecting mirror.
- the wavelength converter is described as an example of the optical device according to the present invention.
- an optical device is configured by bonding and fixing an optical element to a predetermined position on a substrate with an adhesive material, so that the optical element can be disposed close to and fixed on the substrate. This makes it easier to reduce the size of the device.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2003281589A AU2003281589A1 (en) | 2002-07-18 | 2003-07-17 | Optical device and method of assembling the device |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002209074 | 2002-07-18 | ||
| JP2002-209074 | 2002-07-18 | ||
| JP2003-74389 | 2003-03-18 | ||
| JP2003074389 | 2003-03-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004010194A1 true WO2004010194A1 (ja) | 2004-01-29 |
Family
ID=30772206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2003/009070 Ceased WO2004010194A1 (ja) | 2002-07-18 | 2003-07-17 | 光学装置およびその組立方法 |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU2003281589A1 (ja) |
| WO (1) | WO2004010194A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005234058A (ja) * | 2004-02-17 | 2005-09-02 | Sigma Koki Kk | 光学ユニット及びこれを用いた光学装置 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0277005A (ja) * | 1988-09-13 | 1990-03-16 | Fujitsu Ltd | 光学部品の接着固定方法 |
| JPH1031142A (ja) * | 1996-07-16 | 1998-02-03 | Nikon Corp | 極薄厚板状の光学素子を備えている光学部品、極薄厚板状の光学素子の接合方法 |
| JPH1123987A (ja) * | 1997-07-09 | 1999-01-29 | Ricoh Co Ltd | レーザーユニット、光書込装置、画像形成装置 |
| JPH11223843A (ja) * | 1998-02-09 | 1999-08-17 | Ushio Sogo Gijutsu Kenkyusho:Kk | 結晶保持装置 |
| JP2000321753A (ja) * | 1999-05-07 | 2000-11-24 | Nikon Corp | フォトマスク、露光装置、及びマイクロデバイス |
| JP2001349636A (ja) * | 2000-06-06 | 2001-12-21 | Shimadzu Corp | 温度調整装置 |
| US6384850B1 (en) * | 1999-09-21 | 2002-05-07 | Ameranth Wireless | Information management and synchronous communications system with menu generation |
-
2003
- 2003-07-17 WO PCT/JP2003/009070 patent/WO2004010194A1/ja not_active Ceased
- 2003-07-17 AU AU2003281589A patent/AU2003281589A1/en not_active Abandoned
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0277005A (ja) * | 1988-09-13 | 1990-03-16 | Fujitsu Ltd | 光学部品の接着固定方法 |
| JPH1031142A (ja) * | 1996-07-16 | 1998-02-03 | Nikon Corp | 極薄厚板状の光学素子を備えている光学部品、極薄厚板状の光学素子の接合方法 |
| JPH1123987A (ja) * | 1997-07-09 | 1999-01-29 | Ricoh Co Ltd | レーザーユニット、光書込装置、画像形成装置 |
| JPH11223843A (ja) * | 1998-02-09 | 1999-08-17 | Ushio Sogo Gijutsu Kenkyusho:Kk | 結晶保持装置 |
| JP2000321753A (ja) * | 1999-05-07 | 2000-11-24 | Nikon Corp | フォトマスク、露光装置、及びマイクロデバイス |
| US6384850B1 (en) * | 1999-09-21 | 2002-05-07 | Ameranth Wireless | Information management and synchronous communications system with menu generation |
| JP2001349636A (ja) * | 2000-06-06 | 2001-12-21 | Shimadzu Corp | 温度調整装置 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005234058A (ja) * | 2004-02-17 | 2005-09-02 | Sigma Koki Kk | 光学ユニット及びこれを用いた光学装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003281589A1 (en) | 2004-02-09 |
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