Hello all, I know it's been awhile! I recently added a 1W 405 nm Sanwu Silver to my collection that arrived on August 2. It took a couple weeks for me to schedule my laser to be metered, and I planned to write up a review once I had that data.
One of the research scientists at the Texas Petawatt Laser Facility was nice enough to measure the power of my new laser, as well as a 200 mW 532 nm LasesBTB that I wanted to measure again since it fell 5 feet onto concrete.
The output of the 532 nm was 300-330 mW, the same as last year which is reassuring. However, the 1W 405 nm averaged 500 mW and peaked at 550 mW, far below what I paid for. We used a lens to broaden the beam, and found that it had no effect on the output. We even risked damaging the meter by taking one measurement without the lens, getting the same readings.
I contacted Sanwu and attached a picture of the set-up and reading. They responded, "There is no way it metered around 500mw only with G2 lens, how long the test lasted? 405nm diodes usually requires 40-60 seconds to warm up and reach its full power. We would suggest you to try another 18650 batteries as well".
The laser had been turned on and of quite a few times before taking measurements, and I don't think warm up was an issue. The batteries were protected LG MG1 18650's, fully charged. This is an excellent battery, and buying from Liion I know they're real.
Here's the problem. The research scientist is moving for a new job as director of a Free Electron Laser facility on Monday, and I don't have any more contacts at the Petawatt facility. Are there any members in Texas who would be willing to meter this for me with their meter, and their batteries? If not in Texas, I could ship the laser to a trusted member within the US, preferably closer to Texas. The urgency is related to the length of time Sanwu will wait before they refuse to replace a defective product. Pictures below.
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One of the research scientists at the Texas Petawatt Laser Facility was nice enough to measure the power of my new laser, as well as a 200 mW 532 nm LasesBTB that I wanted to measure again since it fell 5 feet onto concrete.
The output of the 532 nm was 300-330 mW, the same as last year which is reassuring. However, the 1W 405 nm averaged 500 mW and peaked at 550 mW, far below what I paid for. We used a lens to broaden the beam, and found that it had no effect on the output. We even risked damaging the meter by taking one measurement without the lens, getting the same readings.
I contacted Sanwu and attached a picture of the set-up and reading. They responded, "There is no way it metered around 500mw only with G2 lens, how long the test lasted? 405nm diodes usually requires 40-60 seconds to warm up and reach its full power. We would suggest you to try another 18650 batteries as well".
The laser had been turned on and of quite a few times before taking measurements, and I don't think warm up was an issue. The batteries were protected LG MG1 18650's, fully charged. This is an excellent battery, and buying from Liion I know they're real.
Here's the problem. The research scientist is moving for a new job as director of a Free Electron Laser facility on Monday, and I don't have any more contacts at the Petawatt facility. Are there any members in Texas who would be willing to meter this for me with their meter, and their batteries? If not in Texas, I could ship the laser to a trusted member within the US, preferably closer to Texas. The urgency is related to the length of time Sanwu will wait before they refuse to replace a defective product. Pictures below.
