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Federal Register / Vol. 86, No. 58 / Monday, March 29, 2021 / Rules and Regulations b.2.a. Output energy exceeding 1.5 J per pulse and peak power exceeding 30 W; or b.2.b. Average output power exceeding 30 W;
Note: 6A005.b.2.b does not control Argon lasers having an average output power equal to or less than 50 W.
b.3. Output wavelength exceeding 510 nm, but not exceeding 540 nm and any of the following:
b.3.a. Single transverse mode output and any of the following:
b.3.a.1. Output energy exceeding 1.5 J per pulse and peak power exceeding 50 W; or b.3.a.2. Average output power exceeding 50 W; or b.3.b. Multiple transverse mode output and any of the following:
b.3.b.1. Output energy exceeding 1.5 J per pulse and peak power exceeding 150 W; or b.3.b.2. Average output power exceeding 150 W;
b.4. Output wavelength exceeding 540 nm but not exceeding 800 nm and any of the following:
b.4.a. Pulse duration less than 1 ps and any of the following:
b.4.a.1. Output energy exceeding 0.005 J
per pulse and peak power exceeding 5 GW;
or b.4.a.2. Average output power exceeding 20 W; or b.4.b. Pulse duration equal to or exceeding 1 ps and any of the following:
b.4.b.1. Output energy exceeding 1.5 J per pulse and peak power exceeding 30 W; or b.4.b.2. Average output power exceeding 30 W;
b.5. Output wavelength exceeding 800 nm but not exceeding 975 nm and any of the following:
b.5.a. Pulse duration less than 1ps and any of the following:
b.5.a.1. Output energy exceeding 0.005 J
per pulse and peak power exceeding 5 GW;
or b.5.a.2. Single transverse mode output and average output power exceeding 20 W;
b.5.b. Pulse duration equal to or exceeding 1 ps and not exceeding 1 ms and any of the following:
b.5.b.1. Output energy exceeding 0.5 J per pulse and peak power exceeding 50 W;
b.5.b.2. Single transverse mode output and average output power exceeding 20 W;
or b.5.b.3. Multiple transverse mode output and average output power exceeding 50 W;
or b.5.c. Pulse duration exceeding 1 ms and any of the following:
b.5.c.1. Output energy exceeding 2 J per pulse and peak power exceeding 50 W;
b.5.c.2. Single transverse mode output and average output power exceeding 50 W;
or b.5.c.3. Multiple transverse mode output and average output power exceeding 80 W.
b.6. Output wavelength exceeding 975 nm but not exceeding 1,150 nm and any of the following:
b.6.a. Pulse duration of less than 1 ps, and any of the following:
b.6.a.1. Output peak power exceeding 2
GW per pulse;
b.6.a.2. Average output power exceeding 30 W; or
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b.6.a.3. Output energy exceeding 0.002 J
per pulse;
b.6.b. Pulse duration equal to or exceeding 1 ps and less than 1 ns, and any of the following:
b.6.b.1. Output peak power exceeding 5
GW per pulse;
b.6.b.2. Average output power exceeding 50 W; or b.6.b.3. Output energy exceeding 0.1 J per pulse;
b.6.c. Pulse duration equal to or exceeding 1 ns but not exceeding 1 ms and any of the following:
b.6.c.1. Single transverse mode output and any of the following:
b.6.c.1.a. Peak power exceeding 100
MW;
b.6.c.1.b. Average output power exceeding 20 W limited by design to a maximum pulse repetition frequency less than or equal to 1 kHz;
b.6.c.1.c. Wall-plug efficiency exceeding 12%, average output power exceeding 100
W and capable of operating at a pulse repetition frequency greater than 1 kHz;
b.6.c.1.d. Average output power exceeding 150 W and capable of operating at a pulse repetition frequency greater than 1
kHz; or b.6.c.1.e. Output energy exceeding 2 J per pulse; or b.6.c.2. Multiple transverse mode output and any of the following:
b.6.c.2.a. Peak power exceeding 400
MW;
b.6.c.2.b. Wall-plug efficiency exceeding 18% and average output power exceeding 500 W;
b.6.c.2.c. Average output power exceeding 2 kW; or b.6.c.2.d. Output energy exceeding 4 J per pulse; or b.6.d. Pulse duration exceeding 1 ms and any of the following:
b.6.d.1. Single transverse mode output and any of the following:
b.6.d.1.a. Peak power exceeding 500 kW;
b.6.d.1.b. Wall-plug efficiency exceeding 12% and average output power exceeding 100 W; or b.6.d.1.c. Average output power exceeding 150 W; or b.6.d.2. Multiple transverse mode output and any of the following:
b.6.d.2.a. Peak power exceeding 1 MW;
b.6.d.2.b. Wall-plug efficiency exceeding 18% and average output power exceeding 500 W; or b.6.d.2.c. Average output power exceeding 2 kW;
b.7. Output wavelength exceeding 1,150
nm but not exceeding 1,555 nm and any of the following:
b.7.a. Pulse duration not exceeding 1 ms and any of the following:
b.7.a.1. Output energy exceeding 0.5 J per pulse and peak power exceeding 50 W;
b.7.a.2. Single transverse mode output and average output power exceeding 20 W;
or b.7.a.3. Multiple transverse mode output and average output power exceeding 50 W;
or b.7.b. Pulse duration exceeding 1 ms and any of the following:

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b.7.b.1. Output energy exceeding 2 J per pulse and peak power exceeding 50 W;
b.7.b.2. Single transverse mode output and average output power exceeding 50 W;
or b.7.b.3. Multiple transverse mode output and average output power exceeding 80 W;
b.8. Output wavelength exceeding 1,555
nm but not exceeding 1,850 nm, and any of the following:
b.8.a. Output energy exceeding 100 mJ per pulse and peak power exceeding 1 W; or b.8.b. Average output power exceeding 1
W;
b.9. Output wavelength exceeding 1,850
nm but not exceeding 2,100 nm, and any of the following:
b.9.a. Single transverse mode and any of the following:
b.9.a.1. Output energy exceeding 100 mJ
per pulse and peak power exceeding 1 W;
or b.9.a.2. Average output power exceeding 1 W;
b.9.b. Multiple transverse mode and any of the following:
b.9.b.1. Output energy exceeding 100 mJ
per pulse and peak power exceeding 10
kW; or b.9.b.2. Average output power exceeding 120 W; or b.10. Output wavelength exceeding 2,100
nm and any of the following:
b.10.a. Output energy exceeding 100 mJ per pulse and peak power exceeding 1 W; or b.10.b. Average output power exceeding 1 W;
c. Tunable lasers having any of the following:
c.1. Output wavelength less than 600 nm and any of the following:
c.1.a. Output energy exceeding 50 mJ per pulse and peak power exceeding 1 W; or c.1.b. Average or CW output power exceeding 1W;
Note: 6A005.c.1 does not apply to dye lasers or other liquid lasers, having a multimode output and a wavelength of 150
nm or more but not exceeding 600 nm and all of the following:
1. Output energy less than 1.5 J per pulse or a peak power less than 20 W; and 2. Average or CW output power less than 20 W.
c.2. Output wavelength of 600 nm or more but not exceeding 1,400 nm, and any of the following:
c.2.a. Output energy exceeding 1 J per pulse and peak power exceeding 20 W; or c.2.b. Average or CW output power exceeding 20 W; or c.3. Output wavelength exceeding 1,400
nm and any of the following:
c.3.a. Output energy exceeding 50 mJ per pulse and peak power exceeding 1 W; or c.3.b. Average or CW output power exceeding 1 W;
d. Other lasers, not controlled by 6A005.a., 6A005.b, or 6A005.c as follows:
d.1. Semiconductor lasers as follows:
Note:
1. 6A005.d.1 includes semiconductor lasers having optical output connectors e.g., fiber optic pigtails.
2. The control status of semiconductor lasers specially designed for other
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