Laser Power
5
May/100
May/100
Laser Power
How do you calculate the power of a laser beam in terms of the number of photons produced per second?
Thank you.
You’d need to know wavelength or frequency as well.
E = n*e
where E is energy, n is the number of photons and e is the energy of a photon
E = nhf where h is Planck’s constant and f is frequency
Since P = E/t, P = nhf/t where t is time
For a time of 1s t =1 and disappears from the equation:
P = nhf = nhc/l where c is speed of light and l is wavelength
Intel Launches New Low-Power Moorestown Chip For Smartphones (w/ Video)
(PhysOrg.com) — Intel will be releasing their new ultra-low-power Atom base processor designed specifically for mobile devices. The chip package is based on Intel`s 45-nanometer process and packs over 140 million transistors.
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Santec TSL-220 High Power Tunable Semiconductor Laser $8,995.00 |
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UDT 2500 INTEGRATING SPHERE LASER POWER ATTENUATOR $1,895.00 |
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UDT 2500 INTEGRATING SPHERE LASER POWER ATTENUATOR $1,795.00 |
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Coherent PM150-50XC & PM500D Laser Power Sensor & Meter $1,749.99 |
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HP Agilent 81662A Low Power DFB Laser source $1,500.00 |
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HP Agilent 81663A High Power DFB Laser source $1,500.00 |
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COHERENT LASER POWER METER 500A/ THERMOPILE SENSOR PS10 $1,400.00 |
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GIGAHERTZ-OPTIK PT-9610 LASER OPTOMETER POWER NOISE $1,375.00 |
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JDSU 2214-25MLUP Laser and Power supply 2114B-30SLQST $1,150.00 |
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OPHIR LASERSTAR LASER POWER/ENERGY METER with SENSOR $1,099.00 |
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High Voltage Power Supply Kaiser KSI 7.5 KV DC LASER $995.00 |
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Philips PLPS 2000 Pulse Laser Power Supply $995.00 |
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Maxwell Labs 10 kJ/s 22 kV CCDS Laser Power Supply $995.00 |
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Controlaser MT600 Laser Power Supply P/N 199463 $950.00 |
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JDSU ACTERNA OMK-7 Laser light source Power meter $920.00 |
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ITT 7890 Power Hydrogen Thyratron Excimer Laser Trigger $899.95 |
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OPHIR LASER POWER/ENERGY METER model DGX warranty!!! $799.00 |
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ALE Simmer Sim-3 Laser High Voltage DC Power Supply $685.00 |
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JDSU 16-6002-280 High Power 960nm Pump Laser 280mW $599.95 |
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Candela Laser Corperation Power Supply, HVD 10000A $499.99 |
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LOT 2 LASER PRECISION POWER HEAD 150W THERMOPILE PROBE $499.99 |
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ROFIN SINAR 15 VOLT POWER SUPPLY FROM ROFIN LASER $499.99 |
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Laser Precision Rk-5720 Power Ratiometer $499.95 |
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CVI Laser Instruments DC Power Supply 155-2 150Volt $499.00 |
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Coherent Power Meter 213 Laser Power Supply $495.00 |
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Metrologic 45-545 Laser Power Meter $450.00 |
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40W High Power 808nm CW Laser diode Array $450.00 |
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Kenometer Pro Graphing laser power meter + Thermopile $400.00 |
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Melles Griot Broadband Laser Power / Energy Meter $375.00 |
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OPTO POWER OPC-D003-808-HB 100 3 WATT LASER $350.00 |
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TWO 75W NPN SILICON RF POWER TRANSISTOR LASER Q-SWITCH $350.00 |
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PIONEER MAGNETICS 4-CHANNEL DC-POWER SUPPLY 1500W LASER $349.00 |
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Ranger Laser Power Supply 120V/240V New!!! $330.00 |
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20W High Power 808nm CW Laser diode Array $320.00 |
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Newport Laser Power Meter Model 820 $300.00 |
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Spectra-Physics: Q-Switch Laser Power Supply ERB $300.00 |
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MOLECTRON POWER MAX 5200 LASER POWE METER $299.99 |
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Coherent LD100 Laser High Power Sensor $299.00 |
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ANALOG MODULES / LASERSCOPE LASER POWER SUPPLY DC 3KW $299.00 |
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Lacey-Harmer LD3002 LASALIGN Laser w/power supply $299.00 |
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Covercraft Universal Pet Pad for Bucket Seat, Red $27.74 The Single Bucket Seat Pet Pad is made from heavy-duty quilted material to protect seats and provide a comfortable pad for pets. Universal fit for a single bucket seat, pet pads are constructed from rip-stop nylon backing, quilted to heavy denier waterproof, PVC backed polyester. Sandwiched in between is soft, high-loft, batting. The entire pet pad is bound with 2 inch black webbing that is double… |
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New Wireless Laser Mouse USB Black Superior Tracking Movement Precise Movement Great For Gaming $36.52 1600 dpi (as opposed to standard 400 dpi) resolution for improved precision, ease in navigation and superior control. Navigation buttons for easy manueuvering through web pages, files and documents. 256 individual ID codes eliminated interference…. |
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Bosch Line Laser Receiver LR2 $199.99 Includes Line Laser Receiver – LR2, Mounting Bracket, 9V Battery… |
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Velform Power Grow Comb $47.95 That hair you once wore so proudly… have you given up hope of ever recovering it? Don’t give up, because now the most cutting-edge hair-growth technology is coming to your home. Introducing the Power Grow Comb by Velform. This breakthrough system has been proven to produce hair growth in a way never seen in the past. It’s so good it’s been proclaimed the latest advancement because it actually pr… |
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4-Pack Rocket Power AAA Alkaline Batteries $4.95 AAA batteries are useful for literally hundreds of devices around the house, garage, toolshed, or workplace. Don’t be without them! They also make a great item to accompany any electronic gift you give. These Rocket brand batteries are of the highest quality and long-lasting. Please note, these are disposable AAA batteries. Here are just a few uses for AAA batteries: Wii remotes, MP3 players, dig… |