Photonic-integrated interferometric array field-of-view splicing subaperture optical path design

Table 1. Subaperture design parameters
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Table 1. Subaperture design parameters
Parameters Specifications
Wavelength/nm 400−680
Field-of-view 2w/° 0.04809
F-number 200.8
Focal length/mm −9680.54
Total length/mm 478.98
Compression ratio 17.6
Telephoto ratio 0.0495
Back focal length/mm 30

Table 2. Single-mode fiber array parameters

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Table 2. Single-mode fiber array parameters

Parameters	Specifications
Array number	65×65
Core diameter/μm	3
Cladding diameter/μm	125
Numerical aperture	0.12
Operating wavelength/nm	400~680
mode field diameter/um(1/e²fit – near field)	3.3@405 nm4.6@630 μm

Table 3. Microlens array parameters
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Table 3. Microlens array parameters
Parameters Specifications
Array number 65×65
Subunit shape Square
materials Fused silica
Focal length/mm 0.523
Thickness/mm 0.5
Microlens pitch/μm 125

Table 4. System parameters
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Table 4. System parameters
Parameters Specifications
Wavelength/nm 400~680
Field-of-view 2w/° 0.04809
F-number 5.2
Focal length/mm −250.923
Total length/mm 459.663
Numerical Aperture 0.0958

Table 5. Fiber coupling efficiency of each field of view
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Table 5. Fiber coupling efficiency of each field of view
Field of view F d C
0° 0.565365 0.444582 0.450298
0.0170177° 0.587243 0.404386 0.481939
0.0236768° 0.610009 0.424886 0.451323

Table 6. Tolerance of subaperture
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Table 6. Tolerance of subaperture
Parameters Specifications
Surface radius/mm ±0.02
Thickness/mm ±0.02
Surface decenter/mm ±0.02
Surface tilt/° ±0.01
Element decenter/mm ±0.05
Element tilt/° ±0.02

Table 7. Tolerance analysis result of subaperture

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Table 7. Tolerance analysis result of subaperture

Parameters	Specifications
The average MTF	0.35209144
MTF value of 98%	>0.21276278
MTF value of 90%	>0.27879303
MTF value of 80%°	>0.31568496
MTF value of 50%	>0.36178363
MTF value of 20%	>0.39748697
MTF value of 10%	>0.40812805
MTF value of 2%	>0.42106348

Table 8. Mechancial position tolerance of fiber coupling
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Table 8. Mechancial position tolerance of fiber coupling
Parameters Specifications
Longitudinal tolerance/mm ±0.025
Transvers tolerance/μm 0.711
angular deviation/° ±3

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Yao-hui HAN, Kun WANG, You-qiang ZHU, Xin-yue LIU. Photonic-integrated interferometric array field-of-view splicing subaperture optical path design[J]. Chinese Optics, 2024, 17(6): 1458

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Paper Information

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Received: Feb. 5, 2024

Accepted: Apr. 15, 2024

Published Online: Jan. 14, 2025

The Author Email:

DOI:10.37188/CO.2024-0030

Topics

Table 1. Subaperture design parameters

Table 1. Subaperture design parameters

Table 2. Single-mode fiber array parameters

Table 2. Single-mode fiber array parameters

Table 3. Microlens array parameters

Table 3. Microlens array parameters

Table 4. System parameters

Table 4. System parameters

Table 5. Fiber coupling efficiency of each field of view

Table 5. Fiber coupling efficiency of each field of view

Table 6. Tolerance of subaperture

Table 6. Tolerance of subaperture

Table 7. Tolerance analysis result of subaperture

Table 7. Tolerance analysis result of subaperture

Table 8. Mechancial position tolerance of fiber coupling

Table 8. Mechancial position tolerance of fiber coupling