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IPC Subclass
H01S

DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL

Introduced: September 1968

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC ELEMENTS
Subclass:
DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL

Description

H01S covers laser devices and stimulated emission sources operating across electromagnetic spectrum ranges from ultraviolet through microwave frequencies. The subclass encompasses laser construction (optical cavities, active media, pumping mechanisms), laser types (solid-state, gas, semiconductor, fiber, dye lasers), and masers and related devices operating at non-optical wavelengths. Related amplification and generation of electromagnetic radiation through stimulated emission principles fall within this classification, while specific laser applications in materials processing, measurement, or communications are typically addressed in specialized classes (B, G, H sections).

Additional Content

Glossary

active medium a medium providing for optical gain by the stimulated emission effect when excited by an excitation (pump) energy source laser lasers It is the acronym for “light amplification by stimulated emission of radiation” but it also refers, in broader sense, to any device using stimulated emission of radiation by excited atoms or molecules. Hence, for example, the expressions “semiconductor laser”, “dye laser”, “optical fibre laser” or “X-ray laser”. pumping the process of providing the active medium for excitation energy

Limiting references

Superluminescent diodes

Application references

Eye surgery using laser Radiation therapy using laser light Sintering by using laser light Working by laser beam, e.g. welding, cutting or boring Joining of preformed parts by using laser light Laser printers , Ring laser gyrometers; Fibre laser gyrometers , Investigating or analysing colour or spectral properties of materials by using tunable lasers Apparatus specially adapted for photomechanical, e.g. photolithographic, production of textured or patterned surfaces Laser heads for recording or reproducing Laser recording associated with non-optical reproducing, or laser reproducing associated with non-optical recording Trimming by laser in the manufacture of resistors Transmission systems employing light, e.g. all-optical repeaters , Photolithographic processing on semiconductor bodies

Related Keywords

AMPLIFIERS for amplifying phase-coherent energy waves using stimulated-emmission devicesDEMODULATION of phase-coherent energy waves using stimulated-emission devices(3) FREQUENCY changing or phase changing of phase-coherent energy waves, using stimulated-emission devicesGENERATION of phase-coherent energy waves by using stimulated emission devicesINVERSION of energy levels in lasers or masersLASER(S)MASERSMODULATION of phase-coherent energy waves using stimulated-emission devicesgenerating electric OSCILLATIONS by stimulated emissions(3) pumping in lasers or masersQUENCHING of energy in lasers or masersdevices using STIMULATEDlasers or masers for

4 direct subcodes

Child Classifications

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  • H01S 4/00 Devices using stimulated emission of electromagnetic radiation in wave ranges other than those covered by groups , or , e.g. phonon masers, X-ray lasers or gamma-ray lasers

Top Applicants

Top 10 applicants by patent filingsfor class H01, 2013–2023, worldwide · Source: EPO PATSTAT

  1. TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 43,574
  2. SAMSUNG ELECTRONICS COMPANY KR 42,206
  3. LG CHEM KR 21,383
  4. APPLIED MATERIALS US 20,441
  5. LG ENERGY SOLUTION KR 20,279
  6. SAMSUNG DISPLAY KR 19,725
  7. CHINESE ACADEMY OF SCIENCES 19,400
  8. TOYOTA MOTOR CORPORATION 18,819
  9. SGCC(STATE GRID CORPORATION OF CHINA) 18,082
  10. TOKYO ELECTRON JP 17,634