Optical Communication Filter
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    Optical Communication Filter

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    1. CWDM Filter

    Our CWDM Full Band Filters feature an advanced thin-film coating design spanning from 1260nm to 1620nm. Engineered with a wide passband profile (λc ± 7.5nm), these filters minimize channel cross-talk and offer ultra-low insertion loss (≤0.3dB) with exceptional thermal longevity in uncooled environments.
    Applications: Metro Access Networks Enterprise WAN CWDM Mux/Demux Modules
    No. Parameter Unit Value
    1 Filter Type - CWDM Full Band
    2 Operation Wavelength Range nm 1260 ~ 1620
    3 Center Wavelength (λc) nm 1270, 1290, 1310, ..., 1610 or 1271, 1291, 1311, ..., 1611
    4 Channel Spacing nm 20
    5 Pass Band Width nm λc ± 7.5
    6 Reflection Band Width nm 1260 ~ (λc - 12.5) & (λc + 12.5) ~ 1620
    7 Max. Insertion Loss within Pass Band dB ≤ 0.3
    8 Ripple within Pass Band dB ≤ 0.2
    9 Transmission Isolation within Adjacent Channel dB ≥ 30
    10 Transmission Isolation within Not-Adjacent Channel dB ≥ 45
    11 Reflection Isolation dB ≥ 15
    12 Max. Insertion Loss within Reflection Band dB ≤ 0.2
    13 Polarization Dependent Loss within Pass Band dB ≤ 0.1
    14 Center Wavelength Temp. Sensitivity pm/℃ < 2.0
    15 Reflection of Backside AR Coating % ≤ 0.2
    16 Angle of Incidence (A.O.I.) ° 1.8
    17 Size (Length × Width × Thickness) mm (1.4 ± 0.1) × (1.4 ± 0.1) × (1.0 ± 0.2)
    18 Wedge Angle ° 0.2
    19 Edge/Corner Chip mm ≤ 0.1
    20 Scratch/Dig - 40/20
     

    2. DWDM Filter (100GHz)

    Designed for high-density architectures, the 100GHz DWDM Filter guarantees strict spectral confinement for ITU grid alignment. Offering both Half Band and Full Band layouts, it exhibits tight passband ripples (≤0.3dB) and superior polarization stability, ensuring flawless multi-channel scaling.
    Applications: Long-Haul Backbones High-Speed Data Centers ITU Grid Multiplexing
    No. Parameter Unit DWDM Full Band DWDM Half Band
    1 Filter Type - DWDM Full Band DWDM Half Band
    2 Band Type - All Band C Band or L Band
    3 Channel Spacing GHz 100
    4 Operation Wavelength Range nm 1260 ~ 1650 1460 ~ 1620
    5 Center Wavelength (λc) Tolerance (@ -3.0dB, AOI=0deg) nm ITU C-Band +0.3 ~ +0.6
    6 Pass Band Width @ -0.5dB nm ≥ 0.52 or ≥ 0.58 ≥ 0.4
    7 Reflection Band Width nm ≤ 1.12 or ≤ 1.10 ≤ 1.2
    8 Max. Insertion Loss within Pass Band dB ≤ 0.5
    9 Ripple within Pass Band dB ≤ 0.3
    10 Transmission Isolation within Adjacent Channel dB ≥ 30
    11 Transmission Isolation within Not-Adjacent Channel dB ≥ 45
    12 Reflection Isolation dB ≥ 13
    13 Max. Insertion Loss within Reflect Band dB ≤ 0.2
    14 Ripple within Reflect Band dB ≤ 0.15
    15 Polarization Dependent Loss within Pass Band dB ≤ 0.1
    16 Center Wavelength Temp. Sensitivity pm/℃ < 1.0
    17 Reflection of Backside AR Coating % ≤ 0.2
    18 Angle of Incidence (A.O.I.) ° 1.8
    19 Size (Length × Width × Thickness) mm (1.4 ± 0.1) × (1.4 ± 0.1) × (1.2 ± 0.2)
    20 Wedge Angle ° 0.2
    21 Edge/Corner Chip mm ≤ 0.1
    22 Scratch/Dig - 40/20
     

    3. DWDM Filter (200GHz)

    The 200GHz DWDM Filter balances precise broadband tolerances with rigid spectral roll-off characteristics. Attaining a wider passband (≥0.8nm @ -0.5dB), it provides optimal power distribution margins for intermediate infrastructure applications under extreme operating temperature variations.
    Applications: Regional Fiber Rings CATV Fiber Links Optical Add-Drop Nodes (OADM)
    No. Parameter Unit DWDM Half Band DWDM Full Band
    1 Filter Type - DWDM Half Band DWDM Full Band
    2 Band Type - C Band or L Band All Band
    3 Channel Spacing GHz 200
    4 Operation Wavelength Range nm 1460 ~ 1620 1260 ~ 1650
    5 Center Wavelength (λc) Tolerance (@ -3.0dB, AOI=0deg) nm ITU C-Band +0.3 ~ +0.6
    6 Pass Band Width @ -0.5dB nm ≥ 0.8
    7 Reflection Band Width nm ≤ 2.4
    8 Max. Insertion Loss within Pass Band dB ≤ 0.5
    9 Ripple within Pass Band dB ≤ 0.3
    10 Transmission Isolation within Adjacent Channel dB ≥ 30
    11 Transmission Isolation within Not-Adjacent Channel dB ≥ 45
    12 Reflection Isolation dB ≥ 13
    13 Max. Insertion Loss within Reflect Band dB ≤ 0.2
    14 Ripple within Reflect Band dB ≤ 0.15
    15 Polarization Dependent Loss within Pass Band dB ≤ 0.1
    16 Center Wavelength Temp. Sensitivity pm/℃ < 1.0
    17 Reflection of Backside AR Coating % ≤ 0.2
    18 Angle of Incidence (A.O.I.) ° 1.8
    19 Size (Length × Width × Thickness) mm (1.4 ± 0.1) × (1.4 ± 0.1) × (1.2 ± 0.2)
    20 Wedge Angle ° 0.2
    21 Edge/Corner Chip mm ≤ 0.1
    22 Scratch/Dig - 40/20
     

    4. DWDM Filter (50GHz) — High Standard

    Crafted for high-end critical system alignments, our High-Standard 50GHz DWDM Filter represents top-tier structural coating complexity. It accomplishes exceptionally deep non-adjacent isolation (≥45dB) and tight polarization control, securing pure multi-demultiplexing integrity.
    Applications: Ultra-Dense DWDM Networks Core Interconnect Centers Coherent Optical Systems
    No. Parameter Unit High-Standard Value
    1 Filter Type - DWDM Half Band
    2 Band Type - C Band or L Band
    3 Channel Spacing GHz 50
    4 Operation Wavelength Range nm 1460 ~ 1620
    5 Center Wavelength (λc) Tolerance (@ -3.0dB, AOI=0deg) nm ITU C-Band +0.3 ~ +0.6
    6 Pass Band Width @ -0.5dB nm ≥ 0.22
    7 Reflection Band Width nm ≤ 0.6
    8 Max. Insertion Loss within Pass Band dB ≤ 0.5
    9 Ripple within Pass Band dB ≤ 0.3
    10 Transmission Isolation within Adjacent Channel dB ≥ 25
    11 Transmission Isolation within Not-Adjacent Channel dB ≥ 45
    12 Reflection Isolation dB ≥ 12.5
    13 Max. Insertion Loss within Reflect Band dB ≤ 0.2
    14 Ripple within Reflect Band dB ≤ 0.15
    15 Polarization Dependent Loss within Pass Band dB ≤ 0.1
    16 Center Wavelength Temp. Sensitivity pm/℃ < 1.0
    17 Reflection of Backside AR Coating % ≤ 0.2
    18 Angle of Incidence (A.O.I.) ° 1.8
    19 Size (Length × Width × Thickness) mm (1.5 ± 0.1) × (1.5 ± 0.1) × (1.2 ± 0.2)
    20 Wedge Angle ° 0.15
    21 Edge/Corner Chip mm ≤ 0.1
    22 Scratch/Dig - 40/20
     

    5. DWDM Filter (50GHz) — Low Standard

    The Low-Standard 50GHz DWDM Filter acts as a value-optimized alternative layout, maintaining standard 50GHz center wavelength accuracy while implementing a flexible isolation configuration (Not-Adjacent Channel ≥22dB) suitable for minor distribution nodes.
    Applications: Access Distribution Nodes Cost-Sensitive Fiber Links Secondary OADM Units
    No. Parameter Unit Low-Standard Value
    1 Filter Type - DWDM Half Band
    2 Band Type - C Band or L Band
    3 Channel Spacing GHz 50
    4 Operation Wavelength Range nm 1460 ~ 1620
    5 Center Wavelength (λc) Tolerance (@ -3.0dB, AOI=0deg) nm ITU C-Band +0.3 ~ +0.8
    6 Pass Band Width @ -0.5dB nm ≥ 0.22
    7 Reflection Band Width nm ≤ 0.6
    8 Max. Insertion Loss within Pass Band dB ≤ 0.5
    9 Ripple within Pass Band dB ≤ 0.3
    10 Transmission Isolation within Adjacent Channel dB ≥ 15
    11 Transmission Isolation within Not-Adjacent Channel dB ≥ 22
    12 Reflection Isolation dB ≥ 12.5
    13 Max. Insertion Loss within Reflect Band dB ≤ 0.2
    14 Ripple within Reflect Band dB ≤ 0.15
    15 Polarization Dependent Loss within Pass Band dB ≤ 0.1
    16 Center Wavelength Temp. Sensitivity pm/℃ < 1.0
    17 Reflection of Backside AR Coating % ≤ 0.2
    18 Angle of Incidence (A.O.I.) ° 1.8
    19 Size (Length × Width × Thickness) mm (1.5 ± 0.1) × (1.5 ± 0.1) × (1.2 ± 0.2)
    20 Wedge Angle ° 0.2
    21 Edge/Corner Chip mm ≤ 0.1
    22 Scratch/Dig - 40/20
     

    6. FWDM Filter

    Our three-port FWDM Filter excels in splitting or combining multi-band operations over standard networks. Delivering smooth edge transitions across 1260-1620nm bands, it maintains sharp isolation configurations with excellent thermal robustness for modular optical links.
    Applications: Three-port FWDM Modules Fiber-to-the-Home (FTTH) Wavelength Monitoring
    No. Parameter Unit Specification Value
    1 Filter Type - FWDM
    2 Operation Wavelength Range nm 1260 ~ 1620
    3 Pass Band Width nm 1540 ~ 1620
    4 Reflection Band Width nm 1260 ~ 1500
    5 Max. Insertion Loss within Pass Band dB ≤ 0.5
    6 Ripple within Pass Band dB ≤ 0.3
    7 Transmission Isolation dB ≥ 40
    8 Reflection Isolation dB ≥ 35
    9 Max. Insertion Loss within Reflect Band dB ≤ 0.2
    10 Ripple within Reflect Band dB ≤ 0.15
    11 Polarization Dependent Loss within Pass Band dB ≤ 0.1
    12 Center Wavelength Temp. Sensitivity pm/℃ < 1.0
    13 Reflection of Backside AR Coating % ≤ 0.2
    14 Angle of Incidence (A.O.I.) ° 1.8
    15 Size (Length × Width × Thickness) mm (1.4 ± 0.1) × (1.4 ± 0.1) × (1.0 ± 0.2)
    16 Wedge Angle ° 0.15
    17 Edge/Corner Chip mm ≤ 0.1
    18 Scratch/Dig - 40/20

    7. MWDM Filter

    Designed precisely for 5G fronthaul expansion, the MWDM Filter implements a 12-channel multiplexing scheme over existing CWDM frameworks. Featuring tight passband dimensions (λc ± 1.5nm) and reliable adjacent isolation (≥30dB), it delivers rapid scalability with minimal capital deployment.
    Applications: 5G Fronthaul Base Stations CWDM Infrastructure Upgrades MWDM Multiplexer Assemblies
    No. Parameter Unit 10nm Spacing Option 7nm Spacing Option
    1 Filter Type - MWDM
    2 Operation Wavelength Range nm 1260 ~ 1400
    3 Center Wavelength (λc) nm 1270, 1280, 1290, ..., 1380 or 1271, 1281, 1291, ..., 1381 1267.5, 1274.5, 1287.5, ..., 1354.5, 1367.5, 1374.5
    4 Channel Spacing nm 10 7
    5 Pass Band Width nm λc ± 2.6 λc ± 3
    6 Reflection Band Width nm 1260 ~ (λc - 4.4) & (λc + 4.4) ~ 1400 1260 ~ (λc - 7) & (λc + 7) ~ 1400
    7 Max. Insertion Loss within Pass Band dB ≤ 0.4
    8 Ripple within Pass Band dB ≤ 0.25 ≤ 0.3
    9 Transmission Isolation (Adjacent Channel) dB ≥ 30 ≥ 25
    10 Transmission Isolation (Not-Adjacent Channel) dB ≥ 35 ≥ 30
    11 Reflection Isolation dB ≥ 13 ≥ 12.5
    12 Max. Insertion Loss within Reflection Band dB ≤ 0.2
    13 Polarization Dependent Loss within Pass Band dB ≤ 0.1
    14 Center Wavelength Temp. Sensitivity pm/℃ < 3.0
    15 Reflection of Backside AR Coating % ≤ 0.2
    16 Angle of Incidence (A.O.I.) ° 1.8
    17 Size (Length × Width × Thickness) mm (1.4 ± 0.1) × (1.4 ± 0.1) × (1.0 ± 0.2)
    18 Wedge Angle ° 0.05 0.2 ~ 0.6
    19 Edge/Corner Chip mm ≤ 0.1
    20 Scratch/Dig - 60/40
     

    8. LAN WDM Filter

    Tailored for high-speed multi-lane networks, our LAN WDM Filter features a highly customized 4.5nm channel gap layout. Boasting an ultra-steep slope profile and optimized substrate surface quality (Scratch/Dig 20/10), it ensures minimal signal attenuation inside compact transceiver packages.
    Applications: 100G / 400G LR4 Modules High-Transmission Transceivers Cloud Data Infrastructure
    No. Parameter Unit Specification Value
    1 Filter Type - LWDM
    2 Band Type - O Band
    3 Operation Wavelength Range nm 1260 ~ 1360
    4 Center Wavelength Tolerance (@ -3.0dB, AOI=0deg) nm 1269.23, 1273.54, 1277.89, 1282.26, 1286.66, 1291.10, 1295.56, 1300.04, 1304.58, 1309.14, 1313.73, 1318.35
    5 Pass Band Width @ -0.3dB nm ≥ λc ± 1.3
    6 Stop Band Width nm ≤ ± 3.1
    7 Max. Insertion Loss within Pass Band dB ≤ 0.3
    8 Ripple within Pass Band dB ≤ 0.2
    9 Transmission Isolation dB ≥ 25
    10 Reflection Isolation dB ≥ 13
    11 Max. Insertion Loss within Stop Band dB ≤ 0.2
    12 Ripple within Stop Band dB ≤ 0.15
    13 Polarization Dependent Loss within Pass Band dB ≤ 0.1
    14 Reflection of Backside AR Coating % ≤ 0.2
    15 Angle of Incidence (A.O.I.) ° 1.8
    16 Size (Length × Width × Thickness) mm (1.4 ± 0.1) × (1.4 ± 0.1) × (1.0 ± 0.2)
    17 Wedge Angle ° 0
    18 Edge/Corner Chip mm ≤ 0.1
    19 Scratch/Dig - 60/40
     

    9. Gain Flattening Filter (GFF)

    Designed for inline optical amplification stabilization, our Gain Flattening Filter (GFF) achieves a strict Peak-to-Peak Error Function (PPEF ≤ ±0.20dB, Typ. ±0.15dB). It accurately reverses erbium-doped fiber gain curvatures across C or L bands, maintaining unified signal uniformity.
    Applications: EDFA Optical Amplifiers Raman Amplification Links Inline Power Equalization
    No. Parameter Unit Specification Value
    1 Filter Type - GFF
    2 Band Type - C Band (or L Band)
    3 Operation Target Wavelength Range nm 1528.5 ~ 1568.8
    4 GFF Target Curved Line - See Attached File
    5 Max IL within Target Wavelength Range dB ≤ 0.2
    6 Error Function (Peak to Peak) dB ≤ 0.25
    7 Polarization Dependent Loss within Pass Band dB ≤ 0.1
    8 Reflection of Backside AR Coating % ≤ 0.2
    9 Angle Tuning % 2 ~ 4
    10 Thermal Wavelength Drift pm/℃ < 2
    11 Angle of Incidence (A.O.I.) ° 1.8
    12 Wedge Angle ° 0.2
    13 Size (Length × Width × Thickness) mm (1.4 ± 0.1) × (1.4 ± 0.1) × (1.0 ± 0.2)
    14 Edge/Corner Chip mm ≤ 0.1
     

    10. Skip Filter

    Our Skip Filter provides flexible band-splitting options tailored for multi-channel DWDM extensions. Assuring steep roll-off properties across defined core boundaries, it delivers low insertion loss variations to optimize high-speed signal pathways.
    Applications: DWDM Band Splitting Optical Mux/Demux Upgrades High-Density Fiber Backbones
    No. Parameter Unit Specification Value
    1 Filter Type - DWDM Skip
    2 Channel Spacing Type - For 200G / For 100G
    3 Skip Type - M Skip N
    4 Operation Wavelength nm 1520 ~ 1570 or Other
    5 Pass band Wavelength nm TBD
    6 Reflection band Wavelength nm TBD
    7 Max. Insertion Loss within Pass Band dB ≤ 0.6
    8 Ripple within Pass Band dB ≤ 0.3
    9 Transmission Isolation dB ≥ 25
    10 Reflection Isolation dB ≥ 13
    11 Max. Insertion Loss within Reflect Band dB ≤ 0.3
    12 Ripple within Pass Band dB ≤ 0.15
    13 Polarization Dependent Loss within Pass Band dB ≤ 0.05
    14 Reflection of Backside AR Coating % ≤ 0.2
    15 Angle of Incidence (A.O.I.) ° 1.8
    16 Size (Length × Width × Thickness) mm (1.7 ± 0.1) × (1.7 ± 0.1) × (1.0 ± 0.2)
    17 Wedge Angle ° 0.2
    18 Edge/Corner Chip mm ≤ 0.1
    19 Scratch/Dig - 40/20

    11. Band Pass Filter

    The customized Band Pass Filter (BPF) functions to lock in dedicated spectral regions while blocking out surrounding noise. Fully customizable across wide operational boundaries, it retains standard industrial tolerances and fine surface specifications.
    Applications: Noise Suppression Systems Custom Channel Isolation Sensors & Analytics Units
    No. Parameter Unit Specification Value
    1 Filter Type - BPF
    2 Operation Wavelength nm TBD
    3 Pass band Wavelength nm TBD
    4 Reflection band Wavelength nm TBD
    5 Max. Insertion Loss within Pass Band dB ≤ 0.5
    6 Ripple within Pass Band dB ≤ 0.3
    7 Transmission Isolation dB ≥ 25
    8 Reflection Isolation dB ≥ 13
    9 Max. Insertion Loss within Reflect Band dB ≤ 0.2
    10 Ripple within Pass Band dB ≤ 0.15
    11 Polarization Dependent Loss within Pass Band dB ≤ 0.05
    12 Reflection of Backside AR Coating % ≤ 0.2
    13 Angle of Incidence (A.O.I.) ° 1.8
    14 Size (Length × Width × Thickness) mm (1.4 ± 0.1) × (1.4 ± 0.1) × (1.0 ± 0.2)
    15 Wedge Angle ° 0.2
    16 Edge/Corner Chip mm ≤ 0.1
    17 Scratch/Dig - 40/20

    12. 50G PON Filter

    Optimized for multi-generation co-existence layouts, our 50G PON Filter features broad operational bands (1260-1675nm). Implementing a specialized 8° angle of incidence, it guarantees exceptional transmission accuracy across legacy GPON, XG-PON, and high-speed 50G structures.
    Applications: Next-Generation FTTH Coexistence OLT / ONU Transceiver Assemblies PON Coexistence Elements
    No. Parameter Unit Specification Value
    1 Filter Type - 50G PON
    2 Operation Wavelength nm 1260 ~ 1675
    3 Channel Wavelength: GPON nm 1290 ~ 1330 & 1480 ~ 1500
    4 Channel Wavelength: XG PON nm 1260 ~ 1280 & 1575 ~ 1581
    5 Channel Wavelength: 50G PON nm 1284 ~ 1288 & 1340 ~ 1344
    6 Max. Insertion Loss within Pass Band dB ≤ 0.3
    7 Ripple within Pass Band dB ≤ 0.2
    8 Transmission Isolation dB ≥ 25
    9 Reflection Isolation dB ≥ 12.5
    10 Max. Insertion Loss within Reflect Band dB ≤ 0.2
    11 Ripple within Pass Band dB ≤ 0.15
    12 Polarization Dependent Loss within Pass Band dB ≤ 0.1
    13 Reflection of Backside AR Coating % ≤ 0.2
    14 Angle of Incidence (A.O.I.) ° 8
    15 Size (Length × Width × Thickness) mm (0.75 ± 0.1) × (0.75 ± 0.1) × (0.7 ± 0.2)
    16 Wedge Angle ° 0.2
    17 Edge/Corner Chip mm ≤ 0.1
    18 Scratch/Dig - 40/20
     

    13. Edge Filter

    The Edge Filter features sharp cut-off properties to isolate longpass or shortpass spectral blocks. Attaining rapid slope transitions between the passband (1260-1418nm) and reflection band (1424-1620nm), it minimizes boundary loss for specialized signal grouping.
    Applications: Spectral Band Separation Optical Component Isolation Custom Measurement Links
    No. Parameter Unit Specification Value
    1 Filter Type - Edge
    2 Operation Wavelength nm 1260 ~ 1620
    3 Pass band Wavelength nm 1260 ~ 1418
    4 Reflection band Wavelength nm 1424 ~ 1620
    5 Max. Insertion Loss within Pass Band dB ≤ 0.3
    6 Ripple within Pass Band dB ≤ 0.2
    7 Transmission Isolation dB ≥ 15
    8 Reflection Isolation dB ≥ 13
    9 Max. Insertion Loss within Reflect Band dB ≤ 0.2
    10 Ripple within Pass Band dB ≤ 0.15
    11 Polarization Dependent Loss within Pass Band dB ≤ 0.05
    12 Reflection of Backside AR Coating % ≤ 0.2
    13 Angle of Incidence (A.O.I.) ° 1.8
    14 Size (Length × Width × Thickness) mm (1.4 ± 0.1) × (1.4 ± 0.1) × (1.0 ± 0.2)
    15 Wedge Angle ° 0.2
    16 Edge/Corner Chip mm ≤ 0.1
    17 Scratch/Dig - 40/20
     

    14. Tap Filter

    Our Tap Filter delivers robust splitting precision for continuous real-time power diagnostics. Supporting flexible customization metrics (such as 99:1, 98:2, or 95:5 ratios), it combines tight transmittance boundaries with negligible AR backside reflection (≤0.2%) for pristine signal branching.
    Applications: Online Power Tracking Network Performance Monitoring Passive Optical Tap Modules
    No. Parameter Unit Specification Value
    1 Filter Type - Tap Filter
    2 Operation Wavelength Range nm 1260 ~ 1620
    3 Transmittance % 99 ± 0.2 or other tap ratio
    4 Reflectance % 1 ± 0.2 or other tap ratio
    5 Polarization Dependent Loss dB ≤ 0.1
    6 Reflection of Backside AR Coating % ≤ 0.2
    7 Angle of Incidence (A.O.I.) ° 1.8
    8 Size (Length × Width × Thickness) mm (1.4 ± 0.1) × (1.4 ± 0.1) × (1.0 ± 0.2)
    9 Wedge Angle ° 0.2
    10 Edge/Corner Chip mm ≤ 0.1
    11 Scratch/Dig - 40/20