duration, high-peak power pulses from continuous wave (CW) Nd.YAG lasers. RF power (sound waves in the radio frequencies-megahertz) is pumped into the Q-switch crystal, deflecting the beam, changing the Q or quality factor of the laser cavity enough to extinguish the lasing action. Rapidly switching the RF sound waves on and off switches the laser beam on and off. In this way, the laser can be made to emit short duration (nanosecond range) laser pulses at high repetition rates (Kilohertz range).

Nomenclature code:

SECTION XVIII OPTICAL, PHOTOGRAPHIC, CINEMATOGRAPHIC, MEASURING, CHECKING, PRECISION, MEDICAL OR SURGICAL INSTRUMENTS AND APPARATUS; CLOCKS AND WATCHES; MUSICAL INSTRUMENTS; PARTS AND ACCESSORIES THEREOF.

9000000000 80 OPTICAL, PHOTOGRAPHIC, CINEMATOGRAPHIC, MEASURING, CHECKING, PRECISION, MEDICAL OR SURGICAL INSTRUMENTS AND APPARATUS; PARTS AND ACCESSORIES THEREOF.

9013000000 80 Liquid crystal devices not constituting articles provided for more specifically in other headings; lasers, other than laser diodes; other optical appliances and instruments, not specified or included elsewhere in this chapter.

9013900000 80 Parts and accessories.
9013909000 80 Other.

 

Classification justification:
GIR 1 TERMS OF HEADING 9013 OTHER OPTICAL APPLIANCES AND INSTRUMENTS, NOT SPECIFIED OR INCLUDED ELSEWHERE IN THIS CHAPTER GIR 6 TERMS OF ONE-DASH SUBHEADING 9013 90 PARTS AND ACCESSORIES TERMS OF TWO-DASH S/H 9013 90 90 CN CODE
BTI Reference:
GB114945471.
Issuing country:
United Kingdom.
Start date of validity:
.
End date of validity:
2012-01-18.
Language:
English.
Place of issue:
Southend.
Name and adress:
HM Customs & Excise International Trader Operations Alexander House 21 Victoria Avenue Southend-on-sea Essex SS99 1AA.

National keywords:

 

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