Molectron

Information on Molectron / coherent laser power meters. Ultimately for the ezlaze project. I'm mostly interested in pyroelectric heads for pulsed power.

Ecosystem

Summary

Family	Connector	Sensor	Compatible Meters	Memory
J	DB25	Joule: J8 J25 J50 J100 Power: OP-2 S10	3sigma FieldMax-TOP FieldMax-TO FieldMate	25LC320 (SPI)	Joule sensor: J25 is the most common followed by J50. J8 seems rare Power sensor: OP-2 might be the most common. S10 seems rare I've been calling these JSA due to "JSA-BNC", but that name might not be correct
LM (LabMax)	DB25	LM-2 LM-10 LM-30 LM-45 LM-100	4omega?	24C04 (I2C)
LM-P	DB25	LM-P10			LM-P EEPROM looks slightly different than LM and in fact the LabMax-TOP user manual mentions these sensors are not compatible
PM (PowerMax)	DB25	PM10 PM150 PM-P (PowerMax-Pro)	PM5200	93C46N (SPI)	Even if it was electrically compatible w/ JSA EEPROM format is completely different

Ecosystems:

• J DB-25 smart probes
  • Interface: DB25
  • Also known as JSA?
  • 3sigma, FieldMax-TOP, FieldMax-TO, FieldMate
  • Intended to be used with J25, J50 power probes
  • I also have an S10 energy probe, seems to be compatible
• LM DB-25 smart probes
  • Interface: DB25
  • Intended to be used with LM probes

Warning: J25 and LM are not compatible.

Other DB25 probes (none are known to be compatible):

• Ophir
• Laserpoint
• Gentec
• Newport

List of Molectron related power meters:

• 3sigma
• 4omega
• FieldMate
• FieldMax-TO
• FieldMax-TOP
• Fieldmaster
• LabMax-TOP
  • Compatible with LM-, PM-, and PS- model thermopile sensors, and OP-2 and LM-2 model optical sensors. No adapters required.
  • Measures energy to 10000 pps and captures every pulse to 1000 pps with J-model and EnergyMax sensors
  • LabMax is not compatible with the legacy LM-P model energy sensors
    

PM official pinout for thermopile sensors

• COHERENT_LaserPowerSensors_FlowRequirements_FittingSpecs_PinAssignments_04-2017mp.pdf
• https://laserpointerforums.com/threads/help-with-lpm-wiring-db25-pinout-pm5200-to-attach-thermopile-sensor.107079/page-2

Lots of good info:

• Energy Sensors Coherent J25.pdf
• 2009_LMCCatalog86.pdf

There was a conversion box you could buy at one point though (thermal-smartsensor-adapter-data-sheet.pdf), so it might just be different EPROM format

• JSA-BNC Adapter
• 0012-2340: JSA-BNC Adapter for use with 3sigma, FieldMax-TOP, and FieldMax-P
• 1056827: SmartSensor Adapter for use with 3sigma, FieldMax-TOP, FieldMax-TO,and FieldMate
• Automatically configures itself to work with LM-model sensors

J25

TODO: figure out pinout, EEPROM format so I can recal and upgrade adapters

3Sigma

File archive:

3sigmaAppQuickRef.pdf
3sigmaLVDriverUG.pdf
3sigma_LV_Driver.zip
3sigma Users Manual.pdf
3sigmaWinApps.zip

Battery

Ni-MH BATTERY
7.2V 3.8 A-h
MOLECTRON
P/N 0012-0100

JD1000

Power supply: CS-1203000 (12V @ 3A, center positive)

McMaster

J25LP-4 sensor

Came with 3 sigma in the trash

3Sigma output:

Probe Resp: 1.827E+01 V/J @ 248 nm
Probe Cal Date Dec 8 2008

Head label:

Responsivity
1.828e+1 V/J
Cal: 248 nm

COHERENT
Model: J25LP-4

COHERENT CALIBRATION TAG
DATE CALIB 12/08/08
TECH KH
NEXT DUE 12/08/09

Item #: 0010-8145
Serial #: 0437E03

Shell label:

COHERENT
PROBE SERIAL NO. 0437E03

J25LP sensor

Came with JD1000. BNC output but no 25 pin adapter

Back:

MODEL NO: J25LP
SERIAL NO: 238

RESPONSITIVITY
5.10 VOLT/JOULE
337.1 nm

S10 sensor

From 3Sigmal (eBay)

3Sigma output:

Probe Resp: 2.570E-1 A/W @ 514 nm
Probe Cal Date Sep 10 2003

DB25 label:

Molectron
MODEL NO.: S10
SERIAL NO. 0338H03

DB25 label:

Molectron
SER NO 0338H03
CAL DATE 9/18/03
CAL DUE 9/18/04
TECH B DUNLAP
0011-6322
TRACETABLE TO NIST

Cable label: 0012-2530

25LC320

• 32K SPI Bus Serial EEPROM

Pin	Function	Notes
1		Silkscreen: Th
2		Silkscreen: Py
3	Sensor +	Silkscreen: SG
4		Silkscreen: S1 4, 6, 14,16 shorted W3 to W4 jumper
5	EEPROM CSn	Pullup resistor to VCC
6		4, 6, 14,16 shorted
7
8
9	Jumper	N/C
10	Jumper	10-12 shorted
11	Jumper	10-12 shorted
12	Jumper	10-12 shorted
13	EEPROM VSS
14		4, 6, 14,16 shorted
15	Sensor -
16		4, 6, 14,16 shorted
17
18
19
20
21
22	EEPROM SCK
23	EEPROM SI
24	EEPROM SO
25	EEPROM VCC	2.5-5.5V

EEPROM wiring for read out

EEPROM pin	Function	DB25 pin	Note
1	CSn	5
2	SO	24
3	WPn	25	VCC
4	VSS	13
5	SI	23
6	SCK	22
7	HOLDn	25	VCC
8	VCC	25

J-25MB-HE sensor

Cable label:

COHERENT
Item# 1110748
Model: J-25MB-HE
Serial#: 0984E07R

Responsitivity
6.694e+0 V/J
Cal 1064 nm

LM-10

LM-10 HTD 250-10600nm 10mW-10w 500mJ/cm2 10ns @ 1064n Laser

Relatively cheap impulse buy to compare EEPROM formats

Significantly more complicated inside. Instead of being a simple BNC out there is a whole bundle of cases. Think this is "heated" version maybe though and there might be a dumber version

Atmel 24C04

• 4KB I2C
• PDIP8
• I was going to make an adapter and figure out pinout, but I decided to just clip on instead

Pin	Function	Notes
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

3Sigma (eBay) meter

Came with CW sensor

3Sigma (dumpster dive) meter

Came w/ sensor + BNC adapter

Screen is messed up

Came with Lemo cable. Doesn't fit trigger ports or anything I can tell

JD1000 meter

Capacitor exploded when plugged in (presumably due to age). Didn't work after, although some lights turned on. Scrapped

Newport 835

Newport project: http://hololaser.kwaoo.me/electronics/Newport835.html

I just happen to also have a few Newport 835s. Unfortunately my inventory is:

• Newport 835, S/N 1477: calibrated for 818-SL, S/N 3190
• Newport 835, S/N 1502: calibrated for 818-SL, S/N 3165
• Newport 818-SL, S/N 3191

...which is close but doesn't entirely match. Dumped the EPROM / calibration data though in case I want to play with it in the future

Liconix 45PM

My oldest laser power meter. Meter + head both have S/N 9110014.

Completely analog / calibrated via pots.

More info

Source code: https://github.com/JohnDMcMaster/molectron