(color online) Laser sources for the first stage of cooling and trapping. (a) Laser source at 461 nm. (b) Laser sources at 679 nm and 707 nm. ISO1–3: optical isolators at 461 nm, 707 nm, and 679 nm, respectively; PD: photodiode; PBS1–5: polarizing beam splitters at 461 nm; PBS6–7: polarizing beam splitters at 707 nm and 679 nm, respectively; λ/2: half-wave plate; λ/4: quarter-wave plate; M3–5: 45°-high-reflection mirrors at 461 nm; AOM1–4: acousto-optic modulators at 461 nm with frequency shifts of +312 MHz, −300 MHz, +220 MHz, and +260 MHz, respectively; AOM5 and AOM6 are acousto-optic modulators at 707 nm and 679 nm, respectively, with frequency shifts of +80 MHz.