The 40-meter 1064nm fiber laser needs an EOM and amplifier for controlling the laser frequency.  This is a table of potential fiber EOMs and some interesting parameters.

|| Fiber EOM Name || Webpage || Datasheet || Cost || Pi Phase Voltage (V_pi) || Attenuation (Loss) || Max Continuous Power Capacity ||
|| Jenoptik || [[https://www.jenoptik.us/products/optoelectronic-systems/light-modulation/integrated-optical-modulators-fiber-coupled/phase-modulator|Jenoptik Link]] || [[https://www.jenoptik.us/-/media/websitedocuments/optics/modulators/modulatorfibel_en.pdf|Jenoptik datasheet]] || $5750 || 6 V || 4 dB || 300 mW ||
|| iXblue NIR-MPX-LN-2   || [[https://photonics.ixblue.com/store/lithium-niobate-electro-optic-modulator/phase-modulators|iXblue]] || [[https://photonics.ixblue.com/sites/default/files/2019-01/1000%20nm%20Phase%20Modulators_0.pdf|iXblue datasheet]] || ??? || 3 V || 3 dB || 100 mW ||
|| EOSpace Ultra-Low Loss || [[https://www.eospace.com/phase-modulator|EOSpace]]        || ??? || ??? || 5 V || 3 dB || ??? ||
|| AdvR-Inc KTP Custom Modulator || [[http://www.advr-inc.com/ktpmodulators/|AdvR-Inc]] || ??? || ??? || 8 V || 4 dB || 250 mW ||
|| Optilab PM-1064-15 || [[https://www.oequest.com/getproduct/21228/cat/1805/page/1|Optilab]] || [[https://www.oequest.com/getDatasheet/id/9708-9708.pdf|optilab datasheet PDF]] || $2050 || 8.1 V || 3.5 dB || 40 mW ||