Macken Instruments: Laser Power Probe Statistics

Laser Power Probe Statistics

Power Range
(watts)

Exposure Time
(sec)

Watts/
Division

Absorbing Head

Overall Length (cm)

Weight (gm)

Accuracy (1)

Repeatability

P20Y

0-20

20

0.2

4.06 x 2.54 cm
(1.6" x 1")

22

89

+/-5%

+/-1.5%

P50Y

0-50

20

0.5

4.24 x 2.54 cm
(1.7" x 1")

22

98

+/-5%

+/-1.5%

P100Y
&
P100C

0-100

20

1

5.08 x 3.18 cm
(2"x1.25")

22

120

+/-5%

+/-1.5%

P200Y
&
P200C

0-200

20

2

5.08 cm dia.
(2" dia.)

22

157

+/-5%

+/-1.5%

P500Y
&
P500C

0-500

20

5

5.08 cm dia.
(2" dia.)

22

183

+/-5%

+/-1.5%

P1000Y
&
P1000C

0-1000

20

10

6.35 cm dia.
(2.5" dia.)

22

287

+/-5%

+/-1.5%

P2000Y
&
P2000C

0-2000

20

20

7.62 cm dia.
(3" dia.)

22

522

+/-5%

+/-1.5%

P4000Y
&
P4000C 0-4000 20 sec 25 8.89 cm dia.
(3.5") 28 753 +/-5% +/-1.5%

P10KY &
P10KC

0-5,000
0-10,000

20 sec (3)
10 sec (2)

28

8.89 cm dia.
(3.5")

28

1144

+/-5%

+/-1.5%

	Power Range (watts)	Exposure Time (sec)	Watts/ Division	Absorbing Head	Overall Length (cm)	Weight (gm)	Accuracy (1)	Repeatability
P20Y	0-20	20	0.2	4.06 x 2.54 cm (1.6" x 1")	22	89	+/-5%	+/-1.5%
P50Y	0-50	20	0.5	4.24 x 2.54 cm (1.7" x 1")	22	98	+/-5%	+/-1.5%
P100Y & P100C	0-100	20	1	5.08 x 3.18 cm (2"x1.25")	22	120	+/-5%	+/-1.5%
P200Y & P200C	0-200	20	2	5.08 cm dia. (2" dia.)	22	157	+/-5%	+/-1.5%
P500Y & P500C	0-500	20	5	5.08 cm dia. (2" dia.)	22	183	+/-5%	+/-1.5%
P1000Y & P1000C	0-1000	20	10	6.35 cm dia. (2.5" dia.)	22	287	+/-5%	+/-1.5%
P2000Y & P2000C	0-2000	20	20	7.62 cm dia. (3" dia.)	22	522	+/-5%	+/-1.5%
P4000Y & P4000C	0-4000	20 sec	25	8.89 cm dia. (3.5")	28	753	+/-5%	+/-1.5%
P10KY & P10KC	0-5,000 0-10,000	20 sec (3) 10 sec (2)	28	8.89 cm dia. (3.5")	28	1144	+/-5%	+/-1.5%

Alternate power ranges can be obtained by doubling or halving exposure time and the indicated power. For CO2 lasers, the "C" coating is recommended because this coating can withstand higher laser power than the broad band "Y" coating.
(1) The accuracy and repeatability of the Power Probes partly depends on the accuracy of the exposure time. The average accuracy of exposures (hand held) has been found to be 0.2 seconds. This amounts to a 1% error for a 20 second exposure time. Many lasers are equipped with a shutter that can produce an exact time exposure.
(2) 10 second exposure time for 10,000 watts.
(3) 20 second exposure time for 5,000 watts.

*Approximate Damage Threshold For Stationary Probes

Power
(Watts)

Time (1)
(sec)

CO2 Probes
(W/cm2)

YAG Probes
(W/cm2)

100

20

10,000

3,000

200

20

7,000

2,500

500

20

4,000

2,000

1,000

20

2,500

1,750

2,000

20

1,500

1,200

4,000

20

1,100

-

0-5,000
10,000

20
10

900

-

*Moving the probe during exposure will increase (up to double) the damage threshold compared to the numbers shown for a stationary probe. To achieve this increase, the head must be moved in a circular motion so that the laser beam does not strike any one area continuously for more than 1.5 seconds.

(1) Exposure time of the laser beam on a power probe head which is rated to accept the indicated power level.

Power Probe Carry Cases

PSCS Hard PlasticCase for P20 to P10K
Soft Fabric Case also available

Macken Instruments has cases
to accomodate all Power Probes.

(sold separately)

email to Macken Instruments,