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Laser Audio Transmission Project 0.8 Class II Laser project for demonstrating light transmission of sound using an HeNe laser Wow your students with a visual demonstration of sound being transmitted over light waves from a laser beam. Simple and easy to set up, this state-of-the-art equipment package is a breeze to use. Simply insert the microphone into the jack at the rear of the laser, plug in the VAC-to-DC power adapters and aim the laser beam at the audio receiver's optical detector. Then talk, sing, hum or create almost any imaginable sound into the microphone. Equipment set-up is less than five minutes and the sounds are sent across the room and recreated within nanoseconds. Students will be amazed that somehow voices are electronically and optically relayed from one remote point - without benefit of a "hard connector" in-between. TThe project's audio receiver features total solid state design, adjustable volume control, self-contained and durable surface-mount electronics design, 110 VAC operation and impact-resistant enclosure. Inside the receiver are the sensitive optical semiconductor detector, amplifier, power conditioning electronics and 10 cm (4 in.) speaker. |
Project includes:
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Project includes: IF HN08M modulatable helium neon laser; audio receiver; high-sensitivity electronic microphone; instruction manuals; and two 110-VAC-to-DC power adapters. Also included is three meters of fiber optic cable for demonstrating the light- and information-carrying abilities of optical fiber.
LASER CLASSIFICATIONS
All manufacturers of lasers used in the United States, must conform to regulations administered by the Center for Devices and Radiological Health (CDRH), a branch of the U.S. Department of Health and Human Services. CDRH categorizes lasers as follows:
A laser or laser system which does not present a hazard to skin or eyes for any wavelength or exposure time. Exposure varies with wavelength. For ultraviolet, .2 to .4µm exposure is less than from .8 or near IR, the exposure is < 200µw. Consult CDRH regulations for specific information.
Any visible laser with an output less than 1 mW of power. Warning label requirements - yellow caution label stating maximum output of 1 mW. Generally used as classroom lab lasers, supermarket scanners and laser pointers.
Any visible laser with an output over 1 mW of power with a maximum output of 5 mW of power. Warning label requirements - red danger label stating maximum output of 5 mW. Also used as classroom lab lasers, in holography, laser pointers, leveling instruments, measuring devices and alignment equipment.
Any laser with an output over 5 mW of power with a maximum output of 500 mW of power and all invisible lasers with an output up to 400 mW. Warning label requirements - red danger label stating maximum output. These lasers also require a key switch for operation and a 3.5-second delay when the laser is turned on. Used in many of the same applications as the Class IIIa when more power is required.
Any laser with an output over 500 mW of power. Warning label requirements - red danger label stating maximum output. These lasers are primarily used in industrial applications such as tooling, machining, cutting and welding. Most medical laser applications also require these high-powered lasers.
| Specifications | ||
| CDRH Classification | Class II | |
| Polarization | Random | |
| Laser Emission Color | Red | |
| Laser Mode | TEM00 | |
| Operating | Unit | Value |
| Input Voltage | V | 12 to 18 |
| Input Current | mA | 650 |
| Wavelength | nm | 632.8 |
| Optical Output Power, Nominal | mW | 0.8 |
| Power, (min/max) | mW | .6 / 1.0 |
| Beam Diameter | mm | 0.47 |
| Beam Divergence | mRad | 1.00 |
| Digital Modulation | MHz | n/a |
| Analog Modulation | Hz to MHz | 600 - 20 k |
| Mechanical | Unit | Value |
| Operating Temperature | ° C | 0 - 40 |
| Housing | cm | 5.8 x 8.7 x 36.2 |
Industrial Fiber Optics, Inc
Mountain Standard Time