WO2008013194A1 - Filtre optique, dispositif optique et module optique - Google Patents

Filtre optique, dispositif optique et module optique Download PDF

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Publication number
WO2008013194A1
WO2008013194A1 PCT/JP2007/064560 JP2007064560W WO2008013194A1 WO 2008013194 A1 WO2008013194 A1 WO 2008013194A1 JP 2007064560 W JP2007064560 W JP 2007064560W WO 2008013194 A1 WO2008013194 A1 WO 2008013194A1
Authority
WO
WIPO (PCT)
Prior art keywords
wavelength
optical filter
optical
transmittance
light
Prior art date
Application number
PCT/JP2007/064560
Other languages
English (en)
Japanese (ja)
Inventor
Masatoshi Sato
Original Assignee
Nikon Corporation
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 Nikon Corporation filed Critical Nikon Corporation
Priority to JP2008526790A priority Critical patent/JP5369684B2/ja
Publication of WO2008013194A1 publication Critical patent/WO2008013194A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29346—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by wave or beam interference
    • G02B6/29361—Interference filters, e.g. multilayer coatings, thin film filters, dichroic splitters or mirrors based on multilayers, WDM filters
    • G02B6/29362—Serial cascade of filters or filtering operations, e.g. for a large number of channels
    • G02B6/29365—Serial cascade of filters or filtering operations, e.g. for a large number of channels in a multireflection configuration, i.e. beam following a zigzag path between filters or filtering operations
    • G02B6/29367—Zigzag path within a transparent optical block, e.g. filter deposited on an etalon, glass plate, wedge acting as a stable spacer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/208—Filters for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters
    • G02B5/281—Interference filters designed for the infrared light

Definitions

  • the present invention relates to an optical filter, an optical apparatus, and an optical module.
  • LX4 As a 10 Gbit / s Ethernet system using optical fiber, there is a standard called “LX4”. This is a system that uses four wavelengths of light in the 1300nm band, and the transceiver and receiver require an optical module that combines or demultiplexes the four waves. This optical module usually requires an optical filter to separate these four waves (an optical filter that transmits only light of each wavelength).
  • Such an optical transceiver module is described in, for example, Japanese Patent Laid-Open No. 2005-258268 (Patent Document 1).
  • Patent Document 1 JP 2005-258268 A
  • the present invention has been made in view of such circumstances, and is an optical filter in which the light to be used is not visible light, and can easily identify the wavelength of the light to be used. And an optical device and an optical module using the optical filter.
  • a first means for solving the above problem is that the light to be used is not visible light.
  • the optical filter can be easily identified because it looks different colors corresponding to the wavelength of light to be used when visually observed. “Looks different colors when visually observed” means that the owners of normal color perception can recognize the color difference by comparison.
  • a second means for solving the above-described problem is an optical filter in which the light to be used is not visible light, and the transmission characteristic or reflection characteristic of a part of the wavelength of visible light is the target to be used.
  • the optical filter is set according to the wavelength of light to be transmitted.
  • a third means for solving the above-mentioned problem is the second means, and the optical filter is characterized in that a wavelength of light to be used is 1100 to 1700 nm. .
  • a fourth means for solving the above-mentioned problem is the third means, wherein the wavelength range is 1100 to 1700 nm, and the transmittance is 90% or more at a wavelength width of 10 nm. It is an optical filter characterized by having.
  • a fifth means for solving the above-mentioned problem is the second means, which has a wavelength of 1270-1
  • An optical filter characterized by having a transmittance of 90% or more at 280 nm, a transmittance of 60% or more at a wavelength of 400 to 480 nm, and a transmittance of 40% or less at a wavelength of 500 to 700 nm.
  • a sixth means for solving the above-mentioned problem is the second means, which has a transmittance of 90% or more at a wavelength of 1295 to 1305 nm, and a transmittance of 60% or more at a wavelength of 510 to 540 nm.
  • a seventh means for solving the above-mentioned problem is the second means, which has a transmittance of 90% or more at a wavelength of 1320 to 1330 nm and a transmittance of 60% or more at a wavelength of 565 to 575 nm.
  • An eighth means for solving the above-mentioned problem is the second means, which has a wavelength of 1340 to 1
  • An optical filter characterized by having a transmittance of 90% or more at 350 nm, a transmittance of 60% or more at a wavelength of 630 650 nm, and a transmittance of 40% or less at a wavelength of 400 600 nm
  • a ninth means for solving the above-mentioned problem comprises a combination of a plurality of filters, which is not visible light, has a long wavelength range ⁇ for transmitting light, and is short from the other filter! / Up to the filter
  • the optical filter is characterized in that the order is the same as the order from the filter to the shorter filter.
  • a tenth means for solving the above-mentioned problem is the ninth means, wherein the number of filters constituting the combination of the filters is two or more of the following ABCD. This is an optical filter.
  • x and y are the range of visible light that passes through each filter, expressed as xy in the xy chromaticity diagram.
  • An eleventh means for solving the above-mentioned problem is an optical device in which light to be used is not visible light, and has at least two optical filters, and the optical filters are intended for use.
  • the optical device is characterized in that the transmission characteristic or reflection characteristic in the visible light region is determined so that it looks like a different color when viewed with the wavelength of light
  • a twelfth means for solving the above-mentioned problem is a multiplexing or demultiplexing optical module having four optical filters that respectively reflect light of four types of wavelengths that are not visible light.
  • Each optical filter is an optical module characterized in that the transmission characteristic or reflection characteristic in the visible light region is determined so that it looks like a different color when visually observed.
  • the optical filter looks different colors corresponding to the wavelength of the light to be used when visually observed. Therefore, the identification is easy, and the optical filter is in the wrong position. Incorporation can be prevented.
  • an optical filter in which light to be used is not visible light, an optical filter that can easily identify the wavelength of light to be used, and an optical apparatus using the optical filter An optical module can be provided.
  • FIG. 1 is a diagram showing a spectral transmittance (design value) in the 1300 nm band in the case of 10 ° incidence of an optical filter according to an example of the present invention.
  • FIG. 2 is a diagram showing a spectral transmittance (design value) at a visible light in the case of normal incidence of the optical filter according to the embodiment of the present invention.
  • FIG. 3 is a diagram showing, by CIE color coordinates, the color of visible light transmitted through the optical filter of the embodiment of the present invention.
  • FIG. 4 is a diagram showing an optical filter according to an embodiment of the present invention incorporated in an optical multiplexing module of “LX4” standard.
  • FIG. 5 is a diagram showing the spectral transmittance (design value) in the 1300 nm band in the case of 10 ° incidence of the optical filter of the comparative example of the present invention.
  • FIG. 6 is a diagram showing the spectral transmittance (design value) in the visible light region in the case of normal incidence of the optical filter of the comparative example of the present invention.
  • FIG. 7 is a diagram showing the color of visible light transmitted through the optical filter of the comparative example of the present invention in CIE color coordinates.
  • optical filters were manufactured as optical filters for optical multiplexing and demultiplexing modules of the "LX4" standard. These optical filters are made of SiO and Nb on the substrate (refractive index 1.52).
  • a multilayer film of O is laminated, and finally an adhesive (refractive index 1.5) is provided.
  • Tables 1 and 2 are one table and are shown in two for convenience of description.
  • These optical filters whose film thickness is a physical film thickness, are substrate-less optical filters, and the incident surface and reflecting surface are covered with a glass substrate as shown in Fig. 4.
  • An optical filter 4 that transmits light having a wavelength of 1276 nm at 10 ° incidence and reflects light having a wavelength of 1300 nm, 1324 nm, and 1348 nm. (Indicated in Table 1 and 2 as (Filter A).) This optical filter is further designed to transmit visible light (blue) with a wavelength of 400 to 480 nm.
  • Fig. 1 shows the spectral transmittance (design value) in the 1300 nm band at 10 ° incidence in bold solid lines.
  • the spectral transmittance (design value) in the visible light castle in the case of normal incidence is shown in Fig. 2 by a thick solid line.
  • Optical filter 3 that transmits light having a wavelength of 1300 nm at 10 ° incidence and reflects light of 1276 nm, 13 24 nm, and 1348 nm when reflected through glass (see Tables 1 and 2).
  • This optical filter is further designed to transmit visible light (green) having a wavelength of 500 to 550 nm.
  • Fig. 1 shows the spectral transmittance (design value) in the 1300nm band at 10 ° incidence as a thin solid line.
  • the spectral transmittance in the visible light region at normal incidence is shown in Fig. 2 by a thin solid line.
  • the optical filter 2 that transmits light having a wavelength of 1324 nm and reflects light having a wavelength of 1276 nm, 1300 nm, and 1348 nm at an incident light power of 10 ° transmitted through the glass.
  • This optical filter is also designed to transmit visible light (yellow) with a wavelength of 560 to 580 nm! (Indicated in (Finoleta C) in Tables 1 and 2) .
  • Fig. 1 shows the spectral transmittance (design value) in the 1300nm band at 10 ° incidence in bold dotted lines.
  • the spectral transmittance (design value) in the visible light region at normal incidence is shown in Fig. 2 by a thick broken line.
  • [0029] (4) Transmits light with a wavelength of 1348 nm at an incident light power of 10 ° propagating through the glass. It is an optical filter 1 that reflects light at 00nm and 1324nm (indicated in Table 1 and Table 2 as (Filter D)). This optical filter is further designed to transmit visible light (red) having a wavelength of 620 to 680 nm.
  • Fig. 1 shows the spectral transmittance (design value) in the 1300nm band at 10 ° incidence in a thin broken line.
  • the spectral transmittance (design value) in the visible light range in the case of normal incidence is shown in Fig. 2 with thin lines / dots.
  • FIG. 3 shows the color of visible light transmitted through these optical filters in CIE color coordinates.
  • the numbers in the arrows in Fig. 3 indicate the transmission wavelength used.
  • the light that passes through these optical filters is clearly separated into blue, green, yellow, and red, respectively.
  • Such an optical filter was sandwiched between glass substrates 5, adhered with a transparent adhesive 6, and incorporated in an optical multiplexing module of "LX4" standard as shown in FIG.
  • Filter 1 transmits light with a wavelength of 1348 ⁇ m
  • Filter 2 transmits light with a wavelength of 1324 nm
  • Filter 3 transmits light with a wavelength of 1300 nm
  • Filter 4 transmits light with a wavelength of 1276 nm.
  • the light appears red, yellow, green, and blue, so it is easy to check and the integration can be completed in a short time.
  • Fig. 5 shows the spectral transmittance (design value) in the 1300nm band of a conventional optical filter for optical multiplexing and demultiplexing modules of the "LX4" standard designed without considering visible light characteristics.
  • Figure 6 shows the spectral transmittance (design value) in the visible light castle in the case of normal incidence.
  • These optical filters are made by laminating a multilayer film of SiO and NbO on a substrate (refractive index 1.52), and finally an adhesive.
  • the light transmitted through the glass transmits light with a wavelength of 1324 nm at an incident angle of 10 ° and reflects light with a wavelength of 1276 nm, 1300 nm, and 1348 nm in Tables 3 and 4 (Filter G).
  • Light that has propagated through the glass transmits light with a wavelength of 1348 nm at 10 ° incidence and reflects light with 1276 nm, 1300 nm, and 1324 nm is shown as (Filter H) in Tables 3 and 4.
  • the display methods in Tables 3 and 4 are the same as those in Tables 1 and 2.
  • optical filters have the same wavelength band as that of the light transmitted through the glass at an incident light power of 10 °.
  • the relationship between the line type of each data and the design wavelength (design wavelength used) is the same as that shown in Figs.
  • Fig. 7 shows the CIE color coordinates of the visible light transmitted through these optical filters.
  • the numbers in the arrows in Fig. 7 indicate the transmission wavelength used. The light that passes through these optical filters gathers in the vicinity of green, and it is difficult to identify visually.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Optical Filters (AREA)

Abstract

Des filtres (1 à 4) traversent des faisceaux qui ont différentes longueurs d'onde dans une bande de longueur d'onde de 1300 nm, respectivement. Les facteurs de transmission spectrale des filtres dans une région de lumière visible sont précisés de sorte que les filtres apparaissent de couleur rouge, jaune, vert et bleu lorsqu'ils sont visualisés. Par conséquent, on empêche que les filtres soient mal disposés dans un montage et, en outre, l'inspection est facilitée.
PCT/JP2007/064560 2006-07-28 2007-07-25 Filtre optique, dispositif optique et module optique WO2008013194A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008526790A JP5369684B2 (ja) 2006-07-28 2007-07-25 光学フィルタ、光学機器、及び光学モジュール

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-206289 2006-07-28
JP2006206289 2006-07-28

Publications (1)

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WO2008013194A1 true WO2008013194A1 (fr) 2008-01-31

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WO (1) WO2008013194A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003059461A (ja) * 2001-08-10 2003-02-28 Stanley Electric Co Ltd 赤外光投射用電球および該電球を具備する車両用灯具
JP2005241996A (ja) * 2004-02-26 2005-09-08 Nikon Corp 光学フィルタモジュール
JP2005241998A (ja) * 2004-02-26 2005-09-08 Nikon Corp 光学フィルタユニット及び光学フィルタモジュール
JP2005258268A (ja) * 2004-03-15 2005-09-22 Nec Corp 多波長光送信モジュール、多波長光受信モジュール及び光路差補正モジュール

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003059461A (ja) * 2001-08-10 2003-02-28 Stanley Electric Co Ltd 赤外光投射用電球および該電球を具備する車両用灯具
JP2005241996A (ja) * 2004-02-26 2005-09-08 Nikon Corp 光学フィルタモジュール
JP2005241998A (ja) * 2004-02-26 2005-09-08 Nikon Corp 光学フィルタユニット及び光学フィルタモジュール
JP2005258268A (ja) * 2004-03-15 2005-09-22 Nec Corp 多波長光送信モジュール、多波長光受信モジュール及び光路差補正モジュール

Also Published As

Publication number Publication date
JPWO2008013194A1 (ja) 2009-12-17
JP5369684B2 (ja) 2013-12-18

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