Research Progress on Laser Device Used in Laser Target Designator

Ao Feng; Xiaoyun Le; Xiaofu Zhang

doi:10.3788/LOP56.010002

Laser & Optoelectronics Progress, Volume. 56, Issue 1, 010002(2019)

Research Progress on Laser Device Used in Laser Target Designator

Ao Feng¹, Xiaoyun Le¹, and Xiaofu Zhang^1,2、*

Author Affiliations

¹ School of physics and nuclear energy engineering, Beihang University, Beijing 100191, China

² Laboratory of Solid State Optoelectronic Information Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China

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Figures & Tables(14)

Fig. 1. (a) Beam path diagram of AN/AVQ-25 laser device[10] and (b) structure of focus cavity

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Fig. 2. Structure of LD array and temperature control module

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Fig. 3. Accouplement of multi-wave LD and Nd∶YAG absorption spectrum[12]

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Fig. 4. Curves of absorb-translation rate of single and three wavelength pumps in Nd3+ doped crystal with an atom percent of 0.65 and length of 50 mm

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Fig. 5. Individual non-temperature-control laser designator under multi-wave pumping scheme

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Fig. 6. (a) Scheme of long optical path pump and (b) absorption spectrum of Nd3+ doped crystal with different atom percents (0.5%,1%)

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Fig. 7. Non-temperature-control laser device under long optical path pumping scheme

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Fig. 8. Structure of multi-layer VBG[16]

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Fig. 9. Output spectrum before and after wavelength locked by VBG[18]

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Fig. 10. Setup of VBG external cavity feedback[18]

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Fig. 11. Pulsed diode laser rangefinder by SAFRAN Inc, Switzerland

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Table 1. Typical optical parameters of laser device
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Table 1. Typical optical parameters of laser device
Parameter Value
Wavelength /μm 1.06
Energy per pulse /mJ 40-120
Pulse-to-pulse stability /% ±5
Pulse width /ns 15±5
Beam divergence /mrad 0.2-0.3
Repetition rate /s^-1 20

Table 2. Several main kinds of early airborne targeting pods

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Table 2. Several main kinds of early airborne targeting pods

Podmodel	Developer	Weight /kg	Servicetime	Platform	Country	Number ofequipment
AN/AVQ-10Pave Knife		550	1969	F-4A-6	USA	12
AN/AVQ-23Pave Spike	USAF	209	1974~1989	F-4	USA,GBR	156
AN/AVQ-26Pave Tack		629	1982	F-4F111	USA,GBRKOR	150

Table 3. Typical indexes of LTD products hitherto under each pumping scheme

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Table 3. Typical indexes of LTD products hitherto under each pumping scheme

Pumpscheme	Flashlamp	LD(temperature control)	LD(multi-wave)	LD(wavelength locking)	LD(long optical path)
Wavelength /nm	1064	1064	1064	1064	1064
Power@20 Hz /mJ	80±8%	80±2%	80±15%	80±8%	70
Angle /mrad	0.3	0.2	0.3	0.2	0.25
Operatingtemperature /℃	-40-60	-40-60	-32-49	-40-60	-40-60
Powerconsumption /W	Laser: about 130Water pump:about 40	Laser: about 30Temperaturecontrol: <150	Laser: 30-50	Laser: about 50	Laser: <25
Systemcomponent /kg	Laser & Powermodule: about 3Water coolingsystem: about 2.6	Laser module(including range finder module): about 1.6Power module: about 0.9			Laser module+Powermodule<0.7
Pumpingwavelengthshift /( nm·℃^-1)	Broadband	0	0.28	0.01	0.28
Major defect	Low energytransformationratio & high weight	Warm uptime & stand-bypowerconsumption	Low energystability &narrowtemperature range	Complex process& high cost	Complexcraft &low yield

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Ao Feng, Xiaoyun Le, Xiaofu Zhang. Research Progress on Laser Device Used in Laser Target Designator[J]. Laser & Optoelectronics Progress, 2019, 56(1): 010002

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