CN109379143B - Wavelength tunable light receiving component - Google Patents
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- CN109379143B CN109379143B CN201811025329.8A CN201811025329A CN109379143B CN 109379143 B CN109379143 B CN 109379143B CN 201811025329 A CN201811025329 A CN 201811025329A CN 109379143 B CN109379143 B CN 109379143B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
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Abstract
An embodiment of the present invention provides a wavelength tunable light receiving component, including: a substrate; a light input member disposed on the substrate; one or more groups of wavelength tunable components arranged on the substrate and positioned at the output end of the optical input component; one or more sets of light receiving parts which are arranged on the substrate and correspond to the reverse output ends of the one or more sets of wavelength tunable parts one by one; the optical input component is used for outputting optical signals to the wavelength tunable component; the wavelength tunable component is used for tuning the wavelength of an incident optical signal, so that the optical signal in a preset wavelength range is reflected, and the rest optical signal is continuously transmitted; the light receiving component is used for receiving the reflected optical signal in the preset wavelength range. The wavelength tunable light receiving component has the advantages of high reliability, wide bandwidth, large adjustable range and high integration level.
Description
Technical Field
The embodiment of the invention relates to the field of optoelectronic devices for optical communication, in particular to a wavelength tunable light receiving component.
Background
Based on that a time division and wavelength division multiplexing passive optical network (TWDM-PON) is a mainstream technology of a next-generation optical access network (NG-PON2), the FSAN has made clear that the TWDM-PON is a technology choice of NG-PON2, and compared with DWDM, the TWDM-PON has better manageability and compatibility.
For the TWDM-PON, in order to implement a colorless ONU (optical Network unit), the ONU needs to use an adjustable transceiving technology, and thus, a Wavelength Tunable optical receiver (Wavelength Tunable ROSA) is one of core optoelectronic devices of the TWDM-PON system, and the device is mainly applied to a receiving portion in an optical Network unit ONU or an optical Network terminal ONT of a transceiver component in the passive optical Network PON system.
Meanwhile, in the CDC-ROADM system, the scheme of multicast switching is realized by combining MCS (multicast switch) with an adjustable filter, wherein the adjustable filter needs to realize large bandwidth and high wavelength precision adjustment, and has wide application prospect in future intelligent optical networks and 5G carrier networks.
At present, there are various schemes for realizing a wavelength tunable optical receiver, such as a thermal tuning optical receiving method of a multilayer dielectric film, a method for driving a filter to rotate and detect by a small motor, and the reception of different wavelengths by using an MEMS mirror and a filter. The thermal tuning optical receiver based on the multilayer dielectric film is based on the principle of an F-P cavity of the multilayer dielectric film, the passband spectrum is narrow, the requirement on the wavelength precision of input light is high, and the isolation between channels is low. The method for detecting the rotation of the filter plate based on the driving of the small motor has the defects of overlarge device size and higher power consumption. And the MEMS reflector has poor stability and long-term reliability, so that the risk exists.
Disclosure of Invention
To solve the problems in the prior art, embodiments of the present invention provide a wavelength tunable optical receiving component.
In a first aspect, an embodiment of the present invention provides a wavelength tunable optical receiving component, including:
a substrate;
a light input member disposed on the substrate;
one or more groups of wavelength tunable components arranged on the substrate and positioned at the output end of the optical input component;
one or more sets of light receiving parts which are arranged on the substrate and correspond to the reverse output ends of the one or more sets of wavelength tunable parts one by one;
the optical input component is used for outputting optical signals to the wavelength tunable component; the wavelength tunable component is used for tuning the wavelength of an incident optical signal, so that the optical signal in a preset wavelength range is reflected, and the rest optical signal is continuously transmitted; the light receiving component is used for receiving the reflected optical signal in the preset wavelength range.
The wavelength tunable light receiving component provided by the embodiment of the invention realizes tuning and receiving of light wavelength through the light input component, the wavelength tunable component and the light receiving component which are arranged on the substrate, and has the characteristics of high reliability, wide bandwidth, large tunable range and high integration level. When a group of wavelength tunable components are arranged on the substrate, the structure is compact, and the packaging volume is small; when a plurality of groups of wavelength tunable components are arranged on the substrate, the optical signal tuning with multi-channel number can be realized, namely, the size of the tunable optical filter array is increased relative to that of a group of wavelength tunable components.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a wavelength tunable optical receiving device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a wavelength tunable optical receiving element according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of a micro-optic circulator according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a wavelength tunable optical receiving element according to a second embodiment of the present invention.
Description of the reference numerals
100. A substrate, 200, a light input means,
300. a wavelength tunable section, 400, a light receiving section,
310. a micro-optical circulator, 320, a semiconductor refrigerator,
330. a reflective Bragg grating chip, 340, a first focusing lens,
350. a heating electrode 311, a first lateral shift polarization beam splitter prism,
312. a first half-wave plate, 313, a Faraday rotator plate,
314. a second half-wave plate, 315, a second laterally displaced polarizing beam splitter prism,
410. the second focusing lens, 420, the detector,
430. output collimator, 440, total reflection mirror.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a wavelength tunable optical receiving device according to an embodiment of the present invention, and referring to fig. 1, the wavelength tunable optical receiving device includes:
a substrate 100;
a light input member 200 disposed on the substrate 100;
one or more sets of wavelength tunable components 300 disposed on the substrate 100 and at the output end of the optical input component 200;
one or more sets of light receiving parts 400 disposed on the substrate 100 and corresponding to the inverted output ends of the one or more sets of wavelength tunable parts 300 one to one;
the optical input component 200 is configured to output an optical signal to the wavelength tunable component 300; the wavelength tunable component 300 is configured to tune the wavelength of an incident optical signal, so that the optical signal within a preset wavelength range is reflected, and the remaining optical signal continues to be transmitted; the light receiving part 400 is used for receiving the reflected optical signal within the preset wavelength range.
Referring to fig. 1, a substrate 100 is provided with an optical input device 200, one or more sets of wavelength tunable devices 300, and one or more sets of light receiving devices 400. Assuming that the right side of the optical input component 200 is the output end, the wavelength tunable component 300 is located on the right side of the optical input component 200; assuming that the lower left side of the wavelength tunable member 300 is an inverted output terminal, the light receiving part 400 is located at the lower left side of the wavelength tunable member 300. Specifically, one light receiving part 400 corresponds to one wavelength tunable part 300, and the light receiving parts 400 and the wavelength tunable parts 300 are in a one-to-one correspondence relationship.
In the embodiment of the present invention, the optical input component 200 outputs an optical signal, and the optical signal enters the wavelength tunable component 300. The optical input component 200 is an input collimator or an optical fiber array.
Specifically, if only one wavelength tunable component 300 is disposed on the substrate 100, the optical input component 200 is an input collimator, and the input collimator outputs an optical signal to the wavelength tunable component 300, and after the wavelength tuning of the wavelength tunable component 300, a part of the optical signal is reflected, and a part of the optical signal is transmitted, and is transmitted continuously through a medium. The reflected optical signal is an optical signal within a predetermined wavelength range after the wavelength tunable element 300 performs wavelength tuning. The reflected optical signal is output to the light receiving part 400 through the inverted output terminal of the wavelength tunable part 300. The wavelength tunable light receiving component has the advantages of compact structure, small packaging volume and easy modularized integration
Specifically, if only a plurality of wavelength tunable components 300 are disposed on the substrate 100, the plurality of wavelength tunable components 300 realize a tunable optical filter array, each wavelength tunable component 300 can realize optical signal tuning of one channel, and the plurality of wavelength tunable components 300 can realize optical signal tuning of one channel and can realize optical signal tuning of a plurality of channels. At this time, the optical input component 200 is an optical fiber array having a plurality of output optical fibers, wherein one output optical fiber corresponds to one wavelength tunable component 300 and provides an optical signal for one wavelength tunable component 300; the plurality of output fibers may provide optical signals to the plurality of wavelength tunable components 300, respectively. The wavelength tunable optical receiving component of the present embodiment integrates a plurality of wavelength tunable components, so that the volume is increased compared with a structure in which a single wavelength tunable component is integrated, and the structure is compact and integrated.
It should be noted that, in the embodiment of the present invention, the substrate 100 may be a ceramic substrate, or may be a tail portion of a metal housing, that is, the optical input component, the wavelength tunable component, and the light receiving component may be disposed on the ceramic substrate, or may be disposed at a tail portion of a metal tube of the metal housing, and coupled to an optical element inside the metal housing through an optical flat window.
The wavelength tunable light receiving component of the embodiment of the invention realizes tuning and receiving of light wavelength through the light input component, the wavelength tunable component and the light receiving component which are arranged on the substrate, and has the characteristics of high reliability, wide bandwidth, large tunable range and high integration level. When a group of wavelength tunable components are arranged on the substrate, the structure is compact, and the packaging volume is small; when a plurality of groups of wavelength tunable components are arranged on the substrate, the optical signal tuning with multi-channel number can be realized, namely, the size of the tunable optical filter array is increased relative to that of a group of wavelength tunable components.
Fig. 2 is a schematic structural diagram of a wavelength tunable optical receiving component according to a first embodiment of the present invention, and based on the above embodiment, the wavelength tunable component 300 includes:
a micro-optical circulator 310 disposed on the substrate 100 and located at an output end of the optical input component 200, an input end of the micro-optical circulator 310 being aligned with an output end of the optical input component 200;
a semiconductor refrigerator 320 disposed on the substrate 100 and located at a forward output end of the micro-optical circulator 310, the semiconductor refrigerator 320 being used for temperature control;
a reflective bragg grating chip 330 disposed on the semiconductor refrigerator 320;
a first focusing lens 340 coupled to an input of the reflective bragg grating chip 330, the first focusing lens 340 aligned with a forward output of the micro-optical circulator 310.
Referring to fig. 2, a wavelength tunable component 300 according to an embodiment of the present invention includes a micro-optical circulator 310, a semiconductor cooler 320, a reflective bragg grating chip 330, and a first focusing lens 340. The reverse output end of the micro-optical circulator 310 is the reverse output end of the wavelength tunable component 300, and the light receiving component 400 is located at the reverse output end of the micro-optical circulator 310.
In the embodiment of the present invention, the grating in the reflective bragg grating chip 330 is a uniform period microstructure, and is fabricated by semiconductor processes such as photolithography and etching, and the reflective bragg grating is a 5-step bragg grating in this embodiment, as the preferred filter bandwidth.
In the embodiment of the present invention, the semiconductor refrigerator 320 is used to control the temperature of the reflective bragg grating 330, and the semiconductor refrigerator (TEC) is used to control the temperature of the reflective bragg grating chip, so that the reflective bragg grating chip is stabilized at a fixed temperature state, the optimal operating characteristics are maintained, and the long-term stability is better.
Preferably, the first focusing lens 340 is a C lens, and a coupling end surface of the C lens is directly coupled and bonded to the reflective bragg grating chip.
Preferably, the core layer of the reflective bragg grating chip 330 may be germanium-doped silicon dioxide, SiN, Polymer, or silicon. The bragg grating is manufactured by semiconductor processes such as photoetching, etching and the like.
The reflective bragg grating will act as a light wave selective mirror, which is a narrow band optical filter. The spectral light signal is injected into the grating, only a very narrow spectrum of the light signal (centered at the bragg wavelength) is reflected within the grating, and the remaining light waves will continue to propagate through the medium to the next grating without any loss. The working principle of the wavelength tunable light receiving component based on the reflective Bragg grating is as follows:
for any single wavelength tunable component, an optical signal output by an optical input component enters an input end of the micro-optical circulator, is transmitted in a forward direction through the micro-optical circulator, is output to the first focusing lens from a forward output end of the micro-optical circulator, and enters the reflective bragg grating chip after being transmitted by the first focusing lens, the optical signal in a preset wavelength range is reflected by the reflective bragg grating chip, and a reflected light passes through the first focusing lens and the micro-optical circulator and is output to the light receiving component from a reverse output end of the micro-optical circulator, so that the reflected light in the preset wavelength range is received.
Based on the above embodiment, the surface of the reflective bragg grating chip 330 is provided with the heating electrode 350, and the heating electrode 350 is configured to tune the central wavelength of the reflective bragg grating chip 330 through thermal effect to obtain the reflected light in the preset wavelength range.
In this embodiment, the surface of the reflective optical grating chip is provided with the heating electrode 350, the central wavelength of the reflective narrow spectrum can be tuned by using the thermo-optic effect of the material, and the heating electrode is manufactured by semiconductor processes such as deposition, peeling and the like. Preferably, the heating electrode 350 may be disposed at a position having a certain offset from the center of the reflective grating chip, so that the adjustment accuracy may be properly reduced, and a wider range of wavelength tuning may be implemented.
Referring to fig. 2, according to the above embodiment, the light receiving part 400 includes a second focusing lens 410 and a detector 420;
the second focusing lens 410 is disposed on the substrate 100 and aligned with the inverted output end of the wavelength tunable component 300; wherein, the reverse output end of the wavelength tunable component 300 is the reverse output end of the micro-optical circulator 310;
the detector 420 is disposed on the substrate 100 and located outside the second focusing lens 410.
The structure of the wavelength tunable optical receiving component according to the first embodiment of the present invention shown in fig. 2 can be fabricated by:
first, the semiconductor refrigerator 320 is attached to the substrate 100, and the reflective bragg grating chip 330 is fixed to the semiconductor refrigerator 320.
Secondly, the optical input unit 200 outputs an optical signal, the end of the reflective bragg grating chip 330 performs optical power monitoring through a single-core FA, the first focusing lens 340 is clamped by a clamp, the position of the first focusing lens is adjusted to maximize the coupled optical power, and the first focusing lens is coupled and fixed on the end face of the reflective bragg grating chip through ultraviolet glue.
Next, a miniaturized micro-optical circulator 310 is placed at the input end of the first focusing lens 340, and the position and angle of the optical input part 200 are adjusted to maximize the monitored optical power.
Finally, a second focusing lens 410 and a detector 420 are placed at the reverse output end of the miniaturized micro-optical circulator 310, the position of the second focusing lens 410 is adjusted, and the direct current photocurrent is detected through the detector 420, so that the photocurrent is maximized. After the second focusing lens 410 and the detector 420 are fixed in position, the light input part 200 (e.g., input collimator) is fixed on the substrate 100 by the wedge.
Preferably, after the entire wavelength tunable light receiving module is manufactured, a light absorbing material may be coated on the output end of the reflective bragg grating chip 330 to prevent the transmitted spectrum from being refracted in the environment to form optical crosstalk.
Preferably, the detector 420 is a lateral PD and has a working speed of 10 Gb/s. The size of the photosensitive surface is different according to the working speed of the PD, and the design parameters of the second focusing lens need to be optimized according to different PDs.
Preferably, when the light input member is an input collimator, the input collimator is fixed to the substrate, and a vertical center of the input collimator coincides with a height center of the first focusing lens and the second focusing lens.
Fig. 3 is a schematic structural diagram of a micro-optical circulator according to an embodiment of the present invention, and based on the above embodiment, the micro-optical circulator 310 includes:
a first lateral displacement polarization beam splitting prism 311, a first half-wave plate 312, a Faraday rotation plate 313, a second half-wave plate 314 and a second lateral displacement polarization beam splitting prism 315 which are arranged along an optical path in sequence;
the optical axis direction of the first half-wave plate 312 and the crystal surface form a first preset angle, the optical axis direction of the second half-wave plate 314 and the crystal surface form a second preset angle, the polarization rotation angle of the faraday rotation plate 313 is a third preset angle, and the rotation direction is clockwise.
The first lateral displacement polarization splitting prism 311 and the second lateral displacement polarization splitting prism 315 are formed by gluing a polarization beam splitter and a lateral displacement prism, and lateral displacement amounts of the first lateral displacement polarization splitting prism 311 and the second lateral displacement polarization splitting prism 315 are respectively a first preset displacement amount and a second preset displacement amount. It should be noted that the first predetermined displacement and the second predetermined displacement may be equal or unequal, and the specific first predetermined displacement and the specific second predetermined displacement may be measured according to a size of the package, which is not specifically limited in the embodiment of the present invention.
Preferably, the first lateral displacement polarization splitting prism, the first half-wave plate, the Faraday rotation plate, the second half-wave plate and the second lateral displacement polarization splitting prism can be glued into a whole, so that the packaging size is reduced, and the integration level is improved.
It should be noted that, if only one wavelength tunable element 300 is disposed on the substrate 100, preferably, the first half-wave plate has an optical axis direction forming an angle of 22.5 ° with the crystal surface, the second half-wave plate has an optical axis direction forming an angle of 45 ° with the crystal surface, the polarization rotation angle of the faraday rotator is 45 °, the rotation direction is clockwise, the first preset angle is 22.5 °, the second preset angle is 45 °, and the third preset angle is 45 °.
Referring to fig. 3, as shown in fig. 3 (a), when an optical signal is transmitted from the port1 of the micro-optical circulator in the forward direction (along the X direction), the optical signal passes through the first side-shift polarization beam splitter 311, is split into two polarization states, passes through the polarization rotation of the first half-wave plate 312, the faraday rotator 313, and the second half-wave plate 314, and is combined by the second side-shift polarization beam splitter 315, and the optical signal is still output from the port2 along the X direction; as shown in fig. 3 (b), when the optical signal is transmitted from port2 in the reverse direction (in the reverse direction of X), the optical signal finally combined is output from port3 in the reverse direction of y, so that the transmitted optical beam and the reflected optical beam can be separated, the function of a circulator is realized, and the loss of the light receiving component is reduced.
Fig. 4 is a schematic structural diagram of a wavelength tunable light-receiving component according to a second embodiment of the present invention, and based on the above embodiments, the light-receiving component 400 includes an output collimator 430 and a total reflection mirror 440;
the total reflection mirror 400 is disposed on the substrate 100 and aligned with the reverse output end of the wavelength tunable component 300; wherein, the reverse output end of the wavelength tunable component 300 is the reverse output end of the micro-optical circulator 310;
the output collimator 430 is disposed on the substrate 100 and aligned with the light emitting end of the total reflection mirror 440.
Referring to fig. 4, the light receiving part 400 of the second embodiment of fig. 4 is composed of an output collimator 430 and a total reflection mirror 440, and this embodiment implements a passive optical structure. The difference from the first embodiment shown in fig. 2 is that the light receiving part of the first embodiment is composed of a focusing lens 410 and a detector 420, and the light receiving part of the second embodiment is composed of an output collimator 430 and a total reflection mirror 440.
Other alternative embodiments of the first embodiment shown in fig. 2 are all applicable to the second embodiment shown in fig. 4, for example, the internal structures of the wavelength tunable components 300 are the same, the internal structures of the micro-optical circulator 310 are the same, the first focusing lens 340, the reflective bragg grating chip 330, the heating electrode 350, and the like are all the same, and the setting methods of one or more groups of wavelength tunable components are also completely the same, and are not described herein again.
Specifically, the structure of the wavelength tunable light receiving module according to the second embodiment of the present invention shown in fig. 4 includes a ceramic substrate 100, a light input component 200, a miniaturized micro-optical circulator 310, a first focusing lens 340, a semiconductor cooler 320, a reflective bragg grating chip 330, an output collimator 430, and a total reflection mirror 440. The semiconductor refrigerator 320 is attached to the substrate 100, and the reflective bragg grating chip 330 is fixed to the semiconductor refrigerator 320. The optical input unit 200, the miniaturized micro-optical circulator 310, and the semiconductor cooler 320 are fixed on the substrate 100. The first focusing lens 340 is fixed to the end surface of the reflective bragg grating chip 330 by ultraviolet glue. The total reflection mirror 440 is fixed at the exit port3 below the miniaturized micro-optic circulator 310 by gluing to realize the 90 ° rotation angle of the reflected beam, and then coupled and aligned with the output collimator 430, and the output collimator 430 is fixed on the substrate 100.
Preferably, after the entire wavelength tunable optical assembly is manufactured, a light absorbing material is coated on the output end of the reflective bragg grating chip 330 to prevent the transmitted spectrum from being refracted in the environment to form optical crosstalk.
Preferably, when the tunable optical receiver is manufactured, part of micro optical elements such as the collimator may be placed on the ceramic substrate, or may be placed in a metal tail tube of the metal casing, and coupled with the optical element inside the metal casing through the optical flat window.
In summary, the wavelength tunable light receiving component according to the embodiment of the present invention utilizes the thermo-optic effect of the optical waveguide to realize fast and fine switching of the wavelength, and can achieve a switching speed of less than 10ms and a wavelength precision of less than 0.1 nm; compared with an external cavity and MEMS scheme, the adjustable range of the MEMS type micro-electromechanical system is wider and can cover the whole C wave band; the temperature of the Bragg grating chip is controlled by the TEC, so that the wavelength stability is better; the integrated Bragg grating chip and the miniaturized micro-optical circulator realize the dimmable receiving component with compact structure, small packaging volume and easy modularized integration.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A wavelength tunable light receiving element, comprising:
a substrate;
a light input member disposed on the substrate;
one or more groups of wavelength tunable components arranged on the substrate and positioned at the output end of the optical input component;
one or more sets of light receiving parts which are arranged on the substrate and correspond to the reverse output ends of the one or more sets of wavelength tunable parts one by one;
the optical input component is used for outputting optical signals to the wavelength tunable component; the wavelength tunable component is used for tuning the wavelength of an incident optical signal, so that the optical signal in a preset wavelength range is reflected, and the rest optical signal is continuously transmitted; the light receiving part is used for receiving the reflected optical signal in the preset wavelength range;
the wavelength tunable component includes:
a micro-optic circulator disposed on the substrate and at an output end of the light input component, an input end of the micro-optic circulator being aligned with the output end of the light input component;
the semiconductor refrigerator is arranged on the substrate and positioned at the forward output end of the micro-optical circulator and used for temperature control;
the reflection type Bragg grating chip is arranged on the semiconductor refrigerator;
a first focusing lens coupled to an input of the reflective Bragg grating chip, the first focusing lens aligned with a forward output of the micro-optical circulator;
the micro-optical circulator includes:
the device comprises a first lateral displacement polarization beam splitter prism, a first half-wave plate, a Faraday rotation plate, a second half-wave plate and a second lateral displacement polarization beam splitter prism which are sequentially arranged along a light path;
the optical axis direction of the first half-wave plate and the crystal surface form a first preset angle, the optical axis direction of the second half-wave plate and the crystal surface form a second preset angle, the polarization rotation angle of the Faraday rotation plate is a third preset angle, and the rotation direction is clockwise;
the first lateral displacement polarization beam splitter prism and the second lateral displacement polarization beam splitter prism are formed by gluing a polarization beam splitter and a lateral displacement prism, and the lateral displacement of the first lateral displacement polarization beam splitter prism and the lateral displacement of the second lateral displacement polarization beam splitter prism are respectively a first preset displacement and a second preset displacement.
2. The wavelength tunable light receiving module according to claim 1, wherein a surface of the reflective bragg grating chip is provided with a heating electrode, and the heating electrode is configured to tune a center wavelength of the reflective bragg grating chip by a thermal effect so as to obtain a reflected light in a preset wavelength range.
3. The wavelength tunable light receiving assembly according to claim 1 or 2, wherein the optical input component is an input collimator or an optical fiber array.
4. The wavelength tunable light receiving assembly according to claim 1 or 2, wherein the light receiving part comprises a second focusing lens and a detector;
the second focusing lens is arranged on the substrate and aligned with the reverse output end of the wavelength tunable component;
the detector is arranged on the substrate and located on the outer side of the second focusing lens.
5. The wavelength tunable light receiving module according to claim 1 or 2, wherein the light receiving part includes an output collimator and a total reflection mirror;
the total reflection mirror is arranged on the substrate and is aligned with the reverse output end of the wavelength tunable component;
the output collimator is arranged on the substrate and is aligned to the light emergent end of the total reflector.
6. The wavelength tunable light receiving assembly according to claim 1, wherein an output end of the reflective bragg grating chip is coated with a light absorbing material.
7. The wavelength tunable light receiving assembly according to claim 1, wherein the first focusing lens is designed as a C-lens, and a coupling end surface of the C-lens is directly coupled and bonded to the reflective bragg grating chip.
8. The wavelength tunable optical receiving component of claim 4, wherein the detector is a lateral PD and has an operating speed of 10 Gb/s.
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