Design of optical system of high isolation laser communication terminal

Parameters		Value
Wavelength/nm		1 550
FOV1/μrad		500
FOV2/mrad		5
Wave aberration	0 field RMS value/nm	≤44.3
	0 field PV value/nm	≤387.5
	>0.5 field RMS value/nm	≤44.3
	>0.50 field PV value/nm	≤387.5
Isolation/dB		≥70

Table 2. Minimum incident angle, maximum incident angle and surface element distance on each face
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Table 2. Minimum incident angle, maximum incident angle and surface element distance on each face
Name of the element Minimum incident angle/ （°） Maximum incident angle/ （°） Bin distance
Primary 5.1 23.9 221.3
Audition 4.1 25.9 170.6
Turn the mirror 29.8 38.3 218.5
Three mirror 8.4 12.6 286.8

Table 3. Design results of each field of view

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Table 3. Design results of each field of view

	X /(°)	Y /(°)	RMS （λ:1550 nm）
FOV1	0	0	0.007 5
	0	−0.014 324	0.007 3
	0	0.014 324	0.008 4
	−0.014 324	0	0.007 6
	0.014 324	0	0.007 6
FOV2	0	−0.07	0.018 4
	0	0.07	0.019 9
	−0.07	0	0.014 3
	0.07	0	0.014 3
	−0.143 24	0	0.040 8
	0.143 24	0	0.040 8

Table 4. Simulation of isolation degree of optical system with different mirror roughness
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Table 4. Simulation of isolation degree of optical system with different mirror roughness
Roughness/nm Isolation/dB
0.5 74.2
0.8 71.5
1 69.7

Table 5. Measuring the isolation degree of optical system with different mirror roughness
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Table 5. Measuring the isolation degree of optical system with different mirror roughness
Roughness/nm Isolation/dB
Primary: 0.45 74.9
Audition: 0.47
Turn the mirror: 0.44
Three mirror: 0.33

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Xiaoyan Wang, Gaokui Xu. Design of optical system of high isolation laser communication terminal[J]. Infrared and Laser Engineering, 2021, 50(7): 20200521

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Paper Information

Category: Optical communication and sensing

Received: Mar. 10, 2021

Accepted: --

Published Online: Aug. 23, 2021

The Author Email: Xu Gaokui (xugaokui.24@163.com)

DOI:10.3788/IRLA20200521

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Main technical indexes of optical system of laser communication terminal

Table 1. Main technical indexes of optical system of laser communication terminal

Table 2. Minimum incident angle, maximum incident angle and surface element distance on each face

Table 2. Minimum incident angle, maximum incident angle and surface element distance on each face

Table 3. Design results of each field of view

Table 3. Design results of each field of view

Table 4. Simulation of isolation degree of optical system with different mirror roughness

Table 4. Simulation of isolation degree of optical system with different mirror roughness

Table 5. Measuring the isolation degree of optical system with different mirror roughness

Table 5. Measuring the isolation degree of optical system with different mirror roughness

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