We describe continuous wave single-frequency operation of an intracavity frequency-doubled Nd:YLF ring laser end-pumped by a fiber-coupled laser diode. Output power of $770\mathrm{mW}$ has been achieved at $526.5\mathrm{nm}$ . The amplitude noise of the laser reaches the quantum noise limit for frequencies above $5\mathrm{MHz}$ , and the phase noise reaches the quantum noise limit for frequencies above $10\mathrm{MHz}$ . The laser’s emission frequency can be tuned over $12\mathrm{GHz}$ by using an intracavity $\mathrm{Li}\mathrm{Ta}{\mathrm{O}}_3$ electro-optic crystal based Fabry–Perot etalon.